Researchers have grown the first human-monkey hybrid embryos as well as mouse embryos in artificial wombs late into development. These biomedical breakthroughs raise different ethical quandaries.
Coyotes, whose range is expanding, are now at the doorstep of South America.
A skull found in West Greenland is proven to be the first-generation male offspring of a female narwhal and male beluga whale. The creature's unusual diet may have been a result of its strange teeth.