A newly-created mouse-human embryo contains up to 4% human cells — the most human cells yet of any chimera, or an organism made of two different sets of DNA. Surprisingly, those human cells could ...

Though they consulted bioethicists while completing their work, researchers have raised eyebrows by creating monkey-human chimeric embryos by injecting human stem cells into primate embryos. These ...

Our understanding of the human body has sky-rocketed in recent decades, opening doors for everything from brain-controlled prosthetics to world-changing mRNA vaccines. But there are still some secrets ...

The NewsHour Science Unit looks at the debate over scientific research that involves transplanting human stem cells into animal brains. On the Caribbean Island of St. Kitts, these surgeons are ...

Human gametes develop within the body of the resultant organism; It contains a human brain or a brain derived wholly or predominantly from human neural tissues; or It exhibits human facial features or ...

In a ground-breaking experiment, researchers have successfully created the first human-monkey chimera. The work, published in the journal Cell, describes the the first embryo containing both human and ...

An article published April 15 in the journal Cell described how scientists took a blastocyst from a macaque and added human cells. A human-monkey chimeric blastocyst. Credit: Weizhi Ji/Kunming ...

In Greek mythology, a chimera is a monstrous scramble of a lion, goat, and a serpent. In genetics, the term means something only slightly more down-to-earth: an organism with cells from at least two ...

The Endless Frontiers Act, a comprehensive bill sponsored by Sen. Chuck Schumer, D-N.Y., passed the Senate on Friday, leading some critics to point to a little-noticed move that could open a ...

The Senate narrowly rejected an amendment geared toward criminalizing participation in research that created certain chimeras, or human-animal hybrids, in expectation that the federal government could ...