Three research teams have modeled how early embryos find a place to take root

After series of bleak findings, theory sparks hope for alternative energy source within Jupiter’s intriguing moon

Agency may be expanding list of pathogens subject to dangerous “gain-of-function” regulations

Natural selection was at work—but only in populations with no alternative to dairy

HHS secretary vows to end U.S. monkey imports, push for retirement of research primates

The rockhead poacher’s unusual cranial anatomy may help it communicate