Using a scratch-and-sniff test, researchers discovered that smell loss after COVID-19 may linger for more than two years.

While ultramarathoners are capable of huge energy spurts, overall the athletes top out at 2.5 times the metabolic rate needed for basic body functions.

Blazes sparked in wild lands are devastating communities worldwide. The only way to protect them, researchers say, is to re-engineer them.

Protein is having a moment. But even if most people are eating enough protein, studies suggest they may not be eating the right mix.

In The Water Remembers, Amy Bowers Cordalis shares her family’s account of the Indigenous-led fight to restore the Klamath River in the Pacific Northwest.

A study that screened young children in Gaza for malnutrition found that nearly 16 percent suffered from wasting in August 2025.

The global die-off of coral reefs signals a critical shift in Earth’s climate system with global environmental consequences along with economic ones.

Normal cellular processes in living things — from germinating plants to our own cells — create biophotons, though escaping light isn’t visible to us.

Ultraprocessed foods can create powerful pulls similar to those of alcohol, nicotine or opioids, with worrisome consequences for our health.

Sensor data reveal greater noctule bats chasing, catching and chewing on birds during high-altitude, nighttime hunts.

As evidence of alcohol's harms mounts, some people are testing out sobriety. Look to ancient civilizations' ways for a reset, scholars suggest.

Newly discovered African fossils lend a hand to suspicions that an ancient hominid outside our own genus, Homo, made and used stone and bone tools.