Transmissible tumors have been reported in a handful of animal species, but never before among fish. Is it possible in humans?

The government is teaming up with Colossal Biosciences, a private company that claims to have revived extinct dire wolves, to store samples from at-risk animals and plants.

© Lenny Ignelzi/Associated Press

Remains of the man, Joseph Louis Serrao Jr., discovered in a remote area in Olympic National Park in 2000, were identified using forensic genealogy.

Researchers relied on a newer gene-editing technique that may make it possible to engineer embryos, a prospect that has long alarmed bioethicists.