Embryo-like entities are being created in a New York lab using human embryonic stem cells. Scientists hope to learn more about the earliest stages of human development without using actual embryos.
Airbnb has come under fire in the last year following reports that hosts are less likely to rent to African-Americans compared to whites. New research looked at ways to address the discrimination.
Researchers who study developing human embryos have long limited their experimentation to lab embryos that are no more than 14 days into development. Some scientists are now pushing that boundary.
Despite one of the wettest winters on record, California Gov. Jerry Brown hasn't declared the five-year drought over yet. But the water shortages may to be over.
On the mold market — which is a thing, apparently — this bit of green is a "holy relic": some of the mold that helped Alexander Fleming discover penicillin. And it sold for big bucks at auction.
Failure rates for the most common forms of contraception are down, but it's not entirely clear whether it's due to education, availability, or other reasons.
Scientists say they've found the remains of tube- and string-like organisms in Canadian rocks that are at least 3.7 billion years old. But findings like these are always controversial.
Snow surveyors are measuring the health of the snow pack in the high altitude Sierra Nevada. After years of drought, much of the state is now experiencing one of its wettest years on record.
Spring arrived early this year across much of the U.S. NPR's Audie Cornish talks to Jake Weltzin of the U.S. Geological Survey to find out how we know.