This is because if the viruses mix, it could give rise to a highly contagious and deadly new pathogen, sparking fears of a ...

As the H5N1 avian influenza virus continues its rampage through U.S. dairy cow herds, it has also infected human farm workers. A different strain has also infected workers on poultry farms, most ...

LONDON - British scientists want a new expert body to regulate experiments mixing animal and human DNA to make sure no medical or ethical boundaries are crossed. In a report issued today, scientists ...

Research into human-animal chimeras could have a therapeutic payoff, but the work brings up thorny ethical questions.

Scientists tracking thousands of animals found that our physical presence can reshape where wildlife moves and lives, sometimes as strongly as roads, cities, and other human development. Because ...