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About Hybrids & Chimeras

Hybrid animals are created when gametes (reproductive cells) from different species join to form a single embryo. A mule, for example, is the offspring of a female horse and a male donkey. Every cell in the body of hybrids contains genetic material from both parents.

Chimeras, named after creatures from Greek mythology, are created artificially by combining genetic material from different species into a single embryo. The adult animals that develop have different populations of cells that reflect different contributions from the species from which they were produced. Scientists have created the geep, for example, by combining genetic material from both a goat and a sheep.

Partially human hybrid embryos have been created by fusing human cells and animal eggs, and partially human chimeric embryos have been created by injecting human embryonic stem cells into animal embryos. Most scientists want to produce such embryos only for research, and oppose experiments that would allow human-animal chimeras to be brought to term.

The prospect of human-animal chimeras troubles many people and raises troubling questions about their moral and legal status. Would a human-animal chimera have human rights? Could it be patented and owned? What if it were 99.9% human and 0.1% chimpanzee? What of the reverse situation?

With New Program, DARPA To Encourage Safety "Brakes" For Gene Editingby Alex LashXconomyOctober 5th, 2016The US military R&D agency has launched a funding program called "Safe Genes" to find "safety measures that don’t slow us down."
Human-Animal Chimeras and Dehumanizationby John H. EvansOxford University Press BlogOctober 1st, 2016Should we create chimeras like pigs with human qualities? How we talk about humans during this debate may inadvertently change how we look at ourselves.
Human Chimera Research’s Huge (and Thorny) Potentialby Paul KnoepflerWiredSeptember 19th, 2016A stem cell researcher notes a range of tough bioethical questions on the table if the NIH moves forward with lifting its research ban.
US government may fund research to combine human cells and animal cellsAssociated Foreign PressAugust 5th, 2016Stuart Newman asks: What if we have pigs with human brains and they are wondering why we are doing experiments on them? What about human bodies with animal brains? Could we harvest organs from them?
NIH Plans To Lift Ban On Research Funds For Part-Human, Part-Animal Embryosby Rob SteinNPRAugust 4th, 2016Concerns include the inadvertent creation of animals with partly human brains, endowing them with some semblance of human consciousness or human thinking abilities. (Public comment until September 4.)
Organ research scientists combine human stem cells and pig DNAby Kevin Rawlinson & Nicola DavisThe GuardianJune 6th, 2016Safety and ethical questions accompany efforts by researchers to grow human organs for transplants inside pigs.
On Cyborgs and Gene Editing: Lessons from Orphan Blackby Jessica CussinsBiopolitical Times guest contributorJune 1st, 2016The television show takes a cue from science fiction author Donna Haraway and engages the dangers of human genetic modification.
In Search For Cures, Scientists Create Embryos That Are Both Animal And Humanby Rob SteinNPRMay 18th, 2016"You're getting into unsettling ground that I think is damaging to our sense of humanity."
In IVF, Questions About ‘Mosaic’ Embryosby Kira PeikoffThe New York TimesApril 18th, 201620% of embryos have both "normal" and "abnormal" cells, generating false positive genetic test results, and questions among fertility clinics about whether to implant.
CRISPR patent belongs to aliensby Sara ReardonNatureFebruary 29th, 2016Returning with a new season after over a decade, The X Files uses technologies like CRISPR gene editing to tell stories at the intersection of science, politics, and conspiracy theories.
Human Babies from CRISPR Pigsby Stuart NewmanHuffPost ScienceFebruary 29th, 2016300 years after Jonathan Swift, can anyone doubt that the grandchildren of some people born this year will be delivered fresh off the farm?
A Monkey Circles in a Cageby Elliot Hosman, Biopolitical TimesJanuary 29th, 2016Researchers created transgenic monkeys with a gene duplication associated with Rett Syndrome autism in humans, raising concerns of the limits and ethics of using animal models in biomedical research.
Human Genetic Alteration and Gold Mines: California's Stem Cell Agency Takes a Hard Look at Research Standardsby David JensenCalifornia Stem Cell ReportJanuary 27th, 2016The $3 billion California stem cell agency will convene a livestreamed day-long meeting to examine agency policies dealing with human gene editing.
Will creating monkeys with autism-like symptoms be any use?by Sam WongNew ScientistJanuary 25th, 2016Researchers are divided on whether a condition like autism can be meaningfully reproduced in monkeys.
Human-Animal Chimeras Are Gestating on U.S. Research Farmsby Antonio RegaladoMIT Technology ReviewJanuary 6th, 2016A radical new approach to generating human organs is to grow them inside pigs or sheep.
Move Over, Jony Ive — Biologists Are the Next Rock Star Designersby Liz StinsonWIREDNovember 18th, 2015A biotech startup that calls itself an "organism design foundry" and works with designers and artists is part of a US bioeconomy that already generates $350 billion annually.
Should Human Stem Cells Be Used To Make Partly Human Chimeras?by Rob SteinNPRNovember 6th, 2015The NIH has declared a moratorium on research that puts human stem cells into nonhuman animal embryos.
DNA At the Fringes: Twins, Chimerism, and Synthetic DNAby Erin E. MurphyThe Daily BeastOctober 7th, 2015DNA tests are thought to be conclusive, but our genetic material acts in mysterious ways. Chimerism, for example, may "undermine the very basis of the forensic DNA system."
Surgeons Smash Records with Pig-to-Primate Organ Transplantsby Antonio RegaladoMIT Technology ReviewAugust 12th, 2015A biotech company is genetically engineering pigs so that their organs might work in people.
"Jurassic World" and the Dinosaurs at the USDAby Rachel SmolkerTruthoutJune 22nd, 2015The regulations of the US Department of Agriculture are in desperate need of an overhaul if they are to protect the public from the derailing of billions of years of evolution for the purpose of corporate profit-making.
Human DNA Enlarges Mouse Brainsby Elizabeth PennisiScienceFebruary 19th, 2015Researchers have increased the size of mouse brains by giving the rodents a piece of human DNA that controls gene activity.
Of Clocks and Mammoths: The Pitch for De-Extinctionby George Estreich, Biopolitical Times guest contributorFebruary 9th, 2015De-extinction raises a host of questions: ethical, practical, philosophical. But for advocates, there’s a rhetorical question as well: How do you persuade a lay audience to support the project?
Pigs to Peopleby Pete ShanksBiopolitical TimesNovember 24th, 2014Synthetic biology takes aim at xenotransplantation.
Body Upgrades may be Nearing Reality, but Only for the Richby Ian SampleThe GuardianSeptember 5th, 2014Israeli historian Yuval Noah Harari says expensive human enhancements will lead to a society more unequal than ever.
Research Integrity: Cell-Induced Stressby David CyranoskiNature NewsJuly 3rd, 2014Two papers that offered a major breakthrough in stem-cell biology were retracted mired in a controversy that has damaged the reputation of several Japanese researchers.
Transcendence: See it for its Cultural Relevance, Not its Plot Lineby Jessica CussinsBiopolitical TimesMay 1st, 2014Transcendence won’t win you over with its dialogue or love scenes, but it’s a great springboard for pondering what quickly approaching developments in artificial intelligence, synthetic biology, and regenerative medicine may actually mean for society.
New Ways to Engineer the Germlineby Jessica CussinsBiopolitical TimesDecember 18th, 2013A look at a number of emerging techniques that could compromise the international consensus against human inheritable genetic modification.
At the End of the Slippery Slope: Margaret Atwood’s MaddAddam Trilogyby George Estreich, Biopolitical Times guest contributorSeptember 24th, 2013Atwood says her trilogy "invents nothing we haven’t already invented or started to invent" — suggesting that though her work is fiction and not a tract, she also intends to do far more than entertain.
"Democratizing Creation" with Synthetic Biology and Glowing Plantsby Pete ShanksBiopolitical TimesJune 27th, 2013A San Francisco company has raised nearly $500,000 via KickStarter to develop and distribute luminescent mustard plants and roses, in an apparent effort to jump-start commercial synthetic biology.
Japan to Relax Ban on Chimeric Embryo Experimentsby Dennis NormileScienceJune 19th, 2013A scientist pioneering research toward generating human organs in pigs has cleared one hurdle in Japan, but is concerned that finalizing guidelines will take too long, so is considering conducting key experiments in the United States.
Watch and Listen: Two Conversations about the Dangers of Genetically Modified Humans Biopolical TimesJune 12th, 2013At a live event and in a radio interview, developmental biologist Stuart Newman discusses what's wrong with proposals for inheritable human genetic modification.
On Vampires and Chromosomesby George Estreich, Biopolitical Times guest contributorBiopolitical TimesMay 9th, 2013The vampires of the Twilight books have superpowers due to two extra chromosomes. In our fang-free human life, however, having extra chromosomes is not usually seen as a plus.
How are Humans Going to Become Extinct?by Sean CoughlanBBC NewsApril 25th, 2013Experiments in areas such as synthetic biology, nanotechnology and machine intelligence are hurtling forward into the territory of the unintended and unpredictable.
Should We Be Trying to Bring Extinct Species Back to Life?by Pete ShanksAlternetApril 8th, 2013Here's a look at greenwashing, guilt-tripping and the politics of "de-extinction."
The British Embryo Authority and the Chamber of Eugenicsby Stuart A. NewmanHuffington PostMarch 11th, 2013Mitochondria replacement would be a misuse of technology with clear potential for individual and social harms.
The Brain is Not Computableby Antonio RegaladoMIT Technology ReviewFebruary 18th, 2013A leading neuroscientist says Kurzweil’s Singularity isn’t going to happen. Instead, humans will assimilate machines.
Neanderthal Clone Poll Finds Most Americans Oppose Cloning Human Relative by Emily SwansonHuffington PostJanuary 30th, 2013Most Americans are opposed to allowing any scientist to attempt such a feat - with or without a human surrogate.
Neo Neanderthal[With CGS's Pete Shanks]by Alyona MinkovskiHuffPost LiveJanuary 25th, 2013A leading geneticist at Harvard Medical School says he can clone a Neanderthal and resurrect the extinct species. What are the ethical issues, risks and benefits?
Interview with George Church: Can Neanderthals Be Brought Back from the Dead?by Philip Bethge and Johann GrolleDer SpiegelJanuary 18th, 2013The English translation of the interview in which George Church of Harvard University explains how genetic technology and synthetic biology might permit the creation of a Neanderthal-like clone that could be gestated by a woman.
"Adventurous Female Human" Needed to Give Birth to NeandertalGenome WebJanuary 17th, 2013Harvard's George Church on recreating Neandertals, engineering humans to live to 120, making people resistant to viruses, and exchanging DNA with other species.
A Rebuttal to Mark Lynas’ GMO Reversalby Jason MarkEarth Island JournalJanuary 11th, 2013Organic farmer, writer, and environmental policy advocate delves into Lynas' rationale for turning pro-GMO and finds scientific, environmental, economic, and social reasons not to agree.
Could Human Enhancement Turn Soldiers Into Weapons That Violate International Law? Yesby Patrick LinThe AtlanticJanuary 4th, 2013New technologies reveal ambiguities and hidden assumptions in international humanitarian law.
Biotech's 10 Biggest PR Disasters of 2012GMWatchDecember 31st, 20122012 was the year the lights came up on the biotech industry. Its claims, its tactics and its products all came under scrutiny and some of its biggest PR fairytales bit the dust. Here are some prime examples.
FDA Moves Closer to Approval of GMO Fish, Critics Outragedby Carey GillamReutersDecember 21st, 2012A controversial genetically engineered salmon has moved a step closer to the consumer's dining table after the U.S. Food and Drug Administration said the fish didn't appear likely to pose a threat.
Of Monsters and Menby George Estreich, Biopolitical Times guest contributorBiopolitical TimesNovember 29th, 2012The Amazing Spider-Man’s focus on genetic modification is more than incidental.
Synthetic Biology and the Rise of the 'Spider-Goats'by Adam RutherfordThe Guardian [UK]January 14th, 2012"Synthetic organisms at this point should not be out there in the environment; they shouldn't be out there in industry. That's irresponsible and inappropriate."
Chimeric Monkeys Born in Stem Cell Studyby Dan VerganoUSA TodayJanuary 5th, 2012Biologists report the first monkey "chimeras," born from mixtures of very-early stage embryonic cells.
Which Came First the Chicken or the Dinosaur?...Think Againby Emily BeitiksBiopolical TimesOctober 12th, 2011Paleontologist John Horner wants to create a living dinosaur by “reverse evolving” the chicken.
German Ethics Council Weighs In On Human-Animal Chimerasby Gretchen VogelScience InsiderSeptember 27th, 2011A new report by the German Ethics Council addresses the ethics of human-animal mixtures and recommends that certain practices be forbidden.
New rules urged on hybrid animal-human experimentsby Ben HirschlerReutersJuly 21st, 2011A group of leading British researchers say that scientific experiments that insert human genes or cells into animals need new rules to ensure they are ethically acceptable.
Researchers produce two-father mice babies, and bait the hype trap by Marcy DarnovskyBiopolitical TimesDecember 14th, 2010Scientists fuel sensationalist speculation about reproductive methods for gay families.
"Splice" is an Infertile Hybridby Pete ShanksBiopolitical TimesJune 8th, 2010The movie Splice is neither deep enough to be interesting nor shocking enough to succeed as horror.
The "Medical" Justification for Re-creating Neanderthalsby Pete ShanksBiopolitical TimesFebruary 16th, 2010"Should We Clone Neanderthals?" asks an article in Archaeology magazine.
Scientists want debate on animals with human genesby Kate KellandReutersNovember 9th, 2009The UK's Academy of Medical Sciences launched a study to look at the use of animals containing human material in scientific research.
Promises, Promisesby Stuart BlackmanThe ScientistNovember 1st, 2009Ill-judged predictions and projections can be embarrassing at best and, at worst, damaging to the authority of science and science policy.
The rise and fall of hybrids in the UKby Jesse ReynoldsBiopolitical TimesOctober 20th, 2009The remarkable push by UK researchers for animal-human hybrid embryos is another strange tale of science politics and science policy.
Embryo research driven out of Britainby Steve ConnorThe IndependentOctober 5th, 2009Scientists abandon plan to develop stem cells from human-animal hybrid embryos after funding dries up
Strange New World[Book Review]by Jeanette WintersonThe New York TimesSeptember 20th, 2009Margaret Atwood's new novel, "The Year of the Flood," takes place in the same bioengineered world as her 2003 work of speculative fiction, "Oryx and Crake."
Human tissue can be taken for human-animal embryo experiments without consentby Laura DonnellyThe Telegraph (UK)September 12th, 2009Tens of thousands of samples of human tissue will be offered for use in controversial human/animal hybrid embryo research without the consent of the patients who donated them.
Would you like them with a mouse?by Pete ShanksBiopolitical TimesAugust 3rd, 2009Japanese scientists report that mice have (almost) been fooled into making mammoth eggs.
Transgenic Mice: Human, All Too Human?by Marcy DarnovskyBiopolitical TimesJune 3rd, 2009How human must a humanized animal be before we begin to worry? What if our experimental creatures begin to display some degree of human consciousness? And once we're worried, what do we do?
A Human Language Gene Changes the Sound of Mouse Squeaks by Nicholas WadeNew York TimesMay 28th, 2009The transfer of a human gene into a mouse has provided insight into the genetic basis of language.
New Federal Stem Cell Research Guidelines and How to Comment on ThemMay 11th, 2009CGS believes the NIH guidelines strike the right balance needed to allow stem cell research to move forward in a socially responsible manner.
Draft federal stem cell policy gets it rightby Jesse ReynoldsBiopolitical TimesApril 17th, 2009The NIH's new draft guidelines are consistent with President Obama' previous comments and public opinion, and also draw the right lines.
The Human Fertilisation and Embryology Bill 2008A Commentaryby David KingApril 15th, 2009The director of Human Genetics Alert offers an analysis of the UK's new law governing human genetic and reproductive technologies.
Bill allows human egg, animal sperm researchABC NewsMarch 26th, 2009Legislation that would allow human eggs and animal sperm to be combined has been approved by the South Australian Parliament.
More cloning, but still no stem cellsby Jesse ReynoldsBiopolitical TimesFebruary 12th, 2009Three more research teams have created clonal human embryos, but none reported deriving stem cells from them.
Human Genetic Diseases in Dogs?by Pete ShanksBiopolitical TimesFebruary 5th, 2009Dog cloning is a means to an end, say those who are selling it. Human-dog experimental chimeras are a more significant goal than pet replacement.
Animal eggs not a good source for embryonic stem cells: studyAgence France PresseFebruary 2nd, 2009Eggs from cows, rabbits and other animals are not a good source for creating embryonic stem cells
Britain Approves Use of Hybrid Human-Animal Embryos for Stem Cell ResearchAssociated PressOctober 22nd, 2008Plans to allow scientists to use hybrid animal-human embryos for stem cell research won final approval from lawmakers.
Scientists Find Hybrid Embryos Easy to Make by Clive CooksonFinancial TimesJune 20th, 2008Scientists at Newcastle University in the UK have already produced almost 300 hybrid embryos, by inserting human DNA into cow eggs, since their controversial research project started in January.
UK's Prime Minister Brown vs. scientistsby Jesse ReynoldsBiopolitical TimesMay 22nd, 2008Like so many writings advocating cloning-based stem cell research, UK Prime Minister Gordon Brown's recent op ed drifts to distortion and hyperbole.
UK Scientists to Combine Human, Animal Embryos[Interviews CGS's Marcy Darnovsky]CNN Headline NewsMay 21st, 2008CNN's Glenn Beck on cybrids.
South Korean Parliament Passes Law Banning Type Of Cloning, Broadening Embryonic Stem Cell ResearchAgence France-PresseMay 20th, 2008South Korea's Parliament on Friday passed a law that bans animal-human hybrid embryos in stem cell research.
British Lawmakers Allow Hybrid Human-Animal Embryosby Kitty Donaldson and Mark DeenBloombergMay 19th, 2008U.K. lawmakers voted to let scientists use stem cells derived from hybrid human-animal embryos in medical research.
Robert Winston on the UK's fertility billby Jesse ReynoldsBiopolitical TimesMay 13th, 2008Assisted reproduction pioneer Lord Robert Winston had some surprising words about the UK's controversial bill to overhaul its oversight of the reproduction industry and stem cell research.
Embryo research: a source of hope or horror?by Roger HighfieldThe Telegraph (UK)May 9th, 2008As the United Kingdom Parliament prepares to debate a Bill revising the law on embryo research, Telegraph Science Editor Roger Highfield examines the complex issues at stake.
Cloning Alternative May Help Save White Rhinoby Roger HighfieldTelegraphApril 18th, 2008A novel kind of reproduction is to be used to help save one of the world's rarest animals - the northern white rhino - which is on the brink of extinction. The idea is to create cells from a white rhino and blend them with the embryos of a close cousin, the southern white rhino, to create an interspecies chimera.
First British Human-Animal Hybrid Embryos Created by Scientistsby Alok JhaThe GuardianApril 2nd, 2008Cloning techniques using animal eggs produce 32-cell embryos.
Facts on the Groundby Jesse ReynoldsBiopolitical TimesApril 2nd, 2008One need not be that cynical to believe that British cloning researchers are trying to change the "facts on the ground" for the upcoming debate.
An Embryonic Disaster?The government’s new fertility bill is under fire on religious, moral and even scientific groundsby Isabel Oakeshott and Sarah-Kate TempletonThe Sunday TimesMarch 16th, 2008The Human Fertilisation and Embryology Bill is designed to regulate just how far scientists can go when experimenting on embryos or embryo parts. It will also lay down new boundaries for fertility clinics, setting out the circumstances in which controversial techniques for screening embryos for defects, or gender, are allowed.
MPs dismayed by HFEA's hybrid egg decisionby Jonathan PetreThe Telegraph (UK)March 3rd, 2008The body which regulates embryo research is to come under fire for allowing scientists to create part-human, part-animal hybrids.
Singapore to create animals with human DNADPAJanuary 9th, 2008Scientists eager to splice human genes with animal cells are seeking a public feedback on the prospect of such controversial research, the Bioethics Advisory Committee (BAC) said on Wednesday.
Moving the Goalposts on Hybridsby Jesse ReynoldsBiopolitical TimesOctober 12th, 2007In recent years, biologists have been advocating the use of various human-animal constructs in their work. They seem to get what they want. In fact, they may now be getting more than they even asked for.
The Old Gray Lady's "Distressing" Editorialby Jesse ReynoldsBiopolitical TimesSeptember 25th, 2007It's distressing to see the nation's leading newspaper characterize informed choices about health risks -- choices unswayed by thousands of dollars -- as unacceptable barriers to scientific research.
Of Animal Eggs and Human Embryosby EditorsNew York TimesSeptember 24th, 2007There are distressingly few women willing to donate their eggs for experiments at the frontiers of this promising science.
[UK] Fertility watchdog to allow use of human-animal chimera embryos for experimentsDaily MailSeptember 3rd, 2007The Human Fertilisation and Embryology Authority will recommend that the use of the hybrid embryos - where human DNA is put into egg cells removed from dead cows - should go ahead for research purposes.
Embryos injected with animal cells should be given human status, UK bishops urgeby Simon CaldwellCatholic OnlineJune 27th, 2007Human embryos injected with animal cells, or chimeras, should be accorded human status under proposals to be considered by the British Parliament in the fall, said the Catholic bishops of England and Wales
Making Manimalsby William SaletanWashington PostJune 25th, 2007If you've been laughing at those Neanderthal presidential candidates who still don't believe in evolution, it's time to sober up. Every serious scientist knows we evolved from animals. The question now is whether to put our DNA and theirs back together.
File Under: Coming Soon?by Jesse ReynoldsBiopolitical TimesJune 21st, 2007A recent report by the UK's Academy of Medical Sciences leaves the door open for the creation of "'true' hybrid embryos by mixing human and animal gametes."
Experts Slam UK Decision to Allow Human-Animal Embryos, Relax RulesGenetic CrossroadsMay 31st, 2007The British government released its draft recommendations for overhauling regulation of assisted reproduction and embryo research. The most noticed change was the lifting of research prohibitions on creating several kinds of human-animal embryos.
Pushing the Chimeric Envelopeby Osagie K. ObasogieBiopolitical TimesMarch 30th, 2007It was reported this week that Esmail Zanjani at the University of Nevada has created the first human-sheep chimera, with 15% human cells.
USDA Backs Production of Rice With Human Genesby Rick WeissWashington PostMarch 3rd, 2007The Agriculture Department has given a green light for the first commercial production of a food crop engineered to contain human genes, reigniting fears that biomedically potent substances in high-tech plants could escape and turn up in other foods
Anything Goesby Wesley J. SmithThe Weekly StandardFebruary 14th, 2007The International Society for Stem Cell Research (ISSCR) recently announced its "Guidelines for the Conduct of Embryonic Stem Cell Research." The results are not encouraging.
Important Changes in UK Law on Reproductive and Genetic Technologiesby David KingGenetic CrossroadsJanuary 26th, 2007Dr. David King gives his views on government proposals that would reorganize the UK HFEA and set important new rules.
Playing the fear cardby Jesse ReynoldsBiopolitical TimesJanuary 10th, 2007The idea of creating human-animal hybrids is initially deeply repulsive. Although many people may imagine something out of Planet of the Apes, at least one proposal is less problematic than what it would supplant.
UK Stem Cell Vote: It's decision time for 'hybrid' human-animal embryos[Quotes CGS's Marcy Darnovsky]by Marisa TaylorRed HerringJanuary 5th, 2007"The United Kingdom’s regulatory body for stem cell and fertility research will vote Wednesday to determine whether a team of British scientists should be allowed to use animal eggs in human embryonic stem cell research. "
O Brave New World? No thanks.by Jesse ReynoldsBiopolitical TimesNovember 9th, 2006The popular science blogger Pharyngula not only defends the proposal in the UK to use cow eggs in research cloning, but calls for the resulting mostly-human clonal embryo to be implanted and brought to term - in a cow's uterus.
Stem cell experts seek licence to create human-rabbit embryoby Ian SampleThe GuardianOctober 5th, 2006"British scientists are seeking approval to create embryos by fusing human cells with animal eggs in controversial research which will boost stem cell science and tackle some of the most debilitating and untreatable neurological diseases."
Mixing animal and human cells gets more exoticby Paul EliasAssociated PressJune 18th, 2006"The mixing of human and animal cells in the name of medicine has been going on for decades. People are walking around with pig valves in their hearts and scientists have routinely injected human cells into lab mice to mimic diseases."
Of Mice, Men and Stem-Cell Researchby Osagie K. ObasogieSan Francisco ChronicleFebruary 20th, 2006President Bush's State of the Union address highlighted several key policy issues, such as America's dependency on foreign oil, the ongoing war in Iraq and Baby Boomers' impact on Social Security. But the president's call for legislation to prohibit scientists from creating "animal-human hybrids" caught many by surprise; the term was one of the most popular Internet searches in the hours following his speech.
In the brains of mice grow the cells of manSan Francisco ChronicleDecember 13th, 2005Researchers in San Diego have designed mice containing fully functional human nerve cells as a novel way to study and potentially treat neurodegenerative diseases such as Parkinson's and Alzheimer's.
Stem cell scientists debate finer points of research ethicsby Alex BarnumSan Francisco ChronicleJune 26th, 2005"[W]ith the passage of California's stem cell initiative... the stem cell debate is shifting focus. It's no longer about whether to do it, but how to do it in an ethically appropriate way."
Stem cell guidelines get mixed reception: Critics say voluntary rules are too laxby Edie LauSacramento BeeApril 27th, 2005A "committee of the National Academies on Tuesday issued voluntary guidelines for human embryonic stem cell studies... The recommendations fell short, however, of some critics' hopes for more vigorous oversight."
The Other Stem Cell Debateby Jamie Shreeve The New York TimesApril 10th, 2005An in-depth article on the growing use of human-animal chimeras for stem cell research appeared in the Sunday NY Times Magazine.
[UK] MPs say lift ban on reproductive human cloningThe ObserverMarch 20th, 2005A report from a committee of the UK House of Commons will recommend that human genetic modification, reproductive cloning, sex selection for social purposes, and human-animal chimeras should be permitted.
A mix of mice and menby Gregory M. LambChristian Science MonitorMarch 17th, 2005"Injecting animals with human genes raises huge ethical questions - not to mention the 'yuck factor.'"
U.S. Denies Patent for a Too-Human Hybridby Rick WeissWashington PostFebruary 13th, 2005The US Patent Office rejected a request by Stuart Newman and Jeremy Rifkin for a patent on a human-mouse hybrid.
Animal-Human Hybrids Spark Controversyby Maryann MottNational Geographic NewsJanuary 25th, 2005"Scientists have begun blurring the line between human and animal by producing chimeras_a hybrid creature that's part human, part animal... But creating human-animal chimeras... has raised troubling questions."
Of Mice, Men and In-Between: Scientists Debate Blending Of Human, Animal Formsby Rick WeissWashington PostNovember 20th, 2004Scientists are increasingly interested in human-animal hybrid embryos, called chimeras. "But with no federal guidelines in place, an awkward question hovers above the work: How human must a chimera be before more stringent research rules should kick in?"
Genetics bill on the way after long labour (New Zealand)by Kevin TaylorNew Zealand HeraldOctober 5th, 2004Eight years after its first introduction, a bill to regulate assisted reproductive technologies - including bans on reproductive cloning, IGM, and sex selection for social reasons - is ready for floor debate.
Report by the President's Council on Bioethics: Reproduction and ResponsibilityGenetic CrossroadsApril 9th, 2004
FEATURE: HUMAN-ANIMAL CHIMERASGenetic CrossroadsJanuary 13th, 2004
Gods and Monstersby Mark DowieMother Jones (January/February 2004)December 31st, 2003Talking apes, flying pigs, superhumans with armadillo attributes, and other strange considerations of Dr. Stuart Newman's fight to patent a human/animal chimera
China, "The Cloning Superpower"Genetic CrossroadsDecember 17th, 2002
Averting the clone age [PDF]Prospects and perils of human developmental manipulationby Stuart NewmanJournal of Contemporary Health Law and PolicyNovember 30th, 2002
It's worth copying Canada's model for cloning legislationby Richard HayesSeattle TimesJune 3rd, 2002The United States should take the Canadian experience to heart. A broad and informed debate is essential if we are to realize the best and avoid the worst that the new genetic technologies have to offer. We cannot afford to do less on a matter of such consequence.
Greenpeace Prevents Patents on Pig-Human EmbryosGenetic CrossroadsOctober 16th, 2000
POINTERS Genetic CrossroadsSeptember 10th, 1999


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