40-Year Mystery: Doctors Solve a Case of Unexplained Finger Pain

Space factory startup Varda secures NASA partnerships ahead of demo flight next year

The Disturbing Reason a Man's Voice Grew Mysteriously Hoarse Over a Year

While scientists have assessed the status of more than 147,000 plant & animals, there are thousands of species considered too "data deficient" for a full assessment. As a result, those species haven't been included in the listing of threatened or endangered species, updated each year by IUCN.