Science

A 1-year-old boy died on Friday and three other children were hospitalized after all four were apparently exposed to an opioid at a state-licensed day care in the Bronx, city officials said....

Judy Govatos has heard that magical phrase “you’re in remission” twice, in 2015 and again in 2019. She had beaten back Stage 4 lymphoma with such aggressive chemotherapy and other treatments that...

If President Biden wins a second term, his climate policies would take aim at steel and cement plants, factories and oil refineries — heavily polluting industries that have never before had to...

Dr. Leslie Hendeles began prodding the Food and Drug Administration to reject a decongestant in cold medicines when he had a mop of curly red hair and Bill Clinton had just become...

Ko Arimatsu, an astronomer at Kyoto University in Japan, received an intriguing email a couple of weeks ago: An amateur astronomer in his country had spotted a bright flash in Jupiter’s atmosphere.Dr....

Industrial-scale whaling in the 19th and 20th centuries nearly drove many whale species into extinction. Populations of some of the large marine mammals are just starting to recover after the kind of...

Are there galaxy-trotting extraterrestrials zipping through Earth’s skies?A report released on Thursday by a panel convened by NASA does not attempt to provide a definitive answer to that question. Instead, it proposes...

Mexico’s Congress is usually meant to be a venue for solemn presentations on budgets and other serious legislation. But this week, lawmakers heard testimony from a self-proclaimed U.F.O. researcher who brought with...

John Pogonoski, an ichthyologist in Australia, wasn’t about to be fooled by any moray eels. He knew the serpentine fish like to hide among the nooks and crannies of large sponges. But...

Standing around three feet high, the modern koala is roughly 25 pounds of claws and teeth, tufty ears and fluffy white marsupial tummy. You could give one a hug — experts suggest...