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It's easy to make your own yogurt, and when you do, you're in control. Your homemade cultured milk can be worked into a variety of sweet and savory dishes.

Reporting in Proceedings of the National Academy of Sciences, researchers write of finding fossils of bacteria-like organisms that lived nearly two billion years ago. Paleobiologist Martin Brasier of the University of Oxford explains that these ancient creatures belched hydrogen sulfide, the stench of rotten eggs, after meals--suggesting the early Earth may have been a smelly place.

For 2015, Ann Powers picked 16 albums to stand in for the stations of a musical life. Taken as a whole, they represent that old, perpetually useful cliché: Life is change.

A dengue vaccine put thousands of kids at risk for a deadly condition. Some scientists say the manufacturer and health officials did too little to warn parents in the Philippines.

Hopes from the Arab Spring have mostly been dashed. But the era led to "a radical change in the way people think about the authorities, the state, and about their rights," says an Egyptian journalist.

After an internal review, The New York Times now says it built the 2018 podcast Caliphate on a story it cannot vouch for. It says star reporter Rukmini Callimachi will no longer cover terrorism.

Paleoanthropologist Daniel Lieberman says the concept of "getting exercise" is relatively new. His new book, Exercised, examines why we run, lift and walk for a workout when our ancestors didn't.

From 100,000 cases a day in September, India is now down to about 10,000 a day. Is it climate? Demographics? Mask mandates? Scientists are looking for answers.

India's COVID-19 caseload plummeted to record lows in February. Now a startling spike is causing health systems — and possibly law and order — to break down. What went wrong?

From the first vaccine (for smallpox) the questions have been the same. How do we transport it? Who's next to get it? Why so much hesitancy? The answers can be similar — or dramatically different.