Jeffrey Kluger

A South Carolina caregiver assesses a patient with measles symptoms MEASLES IS AN OLD SCOURGE THAT'S RAPIDLY REEMERGING AS a new one.

The Aug. 12 total solar eclipse will stretch from the Russian Arctic, over Greenland and down to Spain. Here's everything you need to know.

If you've ever suspected your dog can read your mind—sussing out through some canine intuition when you're happy, sad, scared, or cross—you're half right.

From Iceland to Spain, crowds were dazzled by the celestial phenomenon.

There's nothing quite like the anxiety of visiting your doctor with a worrisome new symptom. And there's nothing quite like the sublime relief when your doctor examines you and concludes that your symptoms are “normal.”

Rising carbon dioxide levels in the atmosphere do a lot of damage—heat waves, droughts, wildfires, superstorms.

Future Proof If you've been excitedly awaiting the return of the woolly mammoth, you'll have to be patient a little longer.

Around the world, people will have the chance to watch the August 27 lunar eclipse.

Find out why Newton Campbell Jr. made TIME’s list of the most influential people in artificial intelligence

An alarming number of professional football players in the U.S. may someday have chronic traumatic encephalopathy (CTE) , the neurodegenerative