The NewsHour Science Unit looks at the debate over scientific research that involves transplanting human stem cells into animal brains ... If, on the other hand, there were things in the brain ...

In fact, the Academies’ report endorses research that co-mingles human and animal tissue as vital to ensuring that experimental drugs and new tissue replacement therapies are safe for people.

"At this stage we have no reason to think that left- or right-brained animals are ... likely happens in humans. As infants, we don't know that we are destined to prefer one hand over the other.

The National Institute of Health proposed a new policy that would allow researchers to receive federal funds to make part human, part animal embryos. What's False The United States has not ...

The key player in the evolution of the human hand ... fingers on the same hand, and touch each of them. Most primates have opposable thumbs, while some more surprising animals, such as the ...