Life
- Anthropology
Ancient primates’ unchipped teeth hint that they ate mostly fruit
Of more than 400 teeth collected, just 21 were chipped, suggesting that early primate diets were soft on their choppers.
- Life
Bacteria fossils hold the oldest signs of machinery needed for photosynthesis
Microfossils from Australia suggest that cyanobacteria evolved structures for oxygen-producing photosynthesis by 1.78 billion years ago.
- Health & Medicine
Fetuses make a protein that causes morning sickness in pregnancy
A hormone called GDF15 triggers a part of the brain involved in nausea and vomiting, a new study finds. Blocking its action may lead to treatments.
- Animals
Ant face patterns like swirls and stubble might have practical value
Reviewing thousands of ant photos hints that facial surface patterns might offer benefits, like structural support or abrasion protection.
- Animals
Reindeer can sleep while they chew
Brain waves and behaviors suggest that reindeer can doze while chewing, a timesaving strategy for sleeping under tough conditions.
- Life
The Endangered Species Act is turning 50. Has it succeeded?
After 50 years, this landmark law has kept many species alive — but few wild populations have recovered enough to come off the “endangered” list.
- Life
These scientific discoveries set new records in 2023
This year’s record-breaking findings shed new light on human history and the most amazing feats in the animal kingdom.
- Animals
50 years ago, the U.S. Navy enlisted sea lions and other marine mammals
Today, dolphins and sea lions in the U.S. Navy Marine Mammal Program protect harbors and participate in research on animal health and well-being.
- Animals
These are our favorite animal stories of 2023
Spiders that make prey walk the plank, self-aware fish and a pouty T. rex are among the critters that enchanted the Science News staff.
- Animals
Here’s how spiders that go overboard use light to find land
When elongate stilt spiders fall into water, they head for areas that don’t reflect light in the hope of finding dry land, experiments suggest.
- Math
Here are some astounding scientific firsts of 2023
Notable feats include discovering a planet-eating star, extracting RNA from an extinct animal and more.
- Animals
Here are 5 questions about the mystery dog illness making news
Experts suspect a perfect storm of conditions, rather than a new bug, is what’s driving “atypical kennel cough” cases in dogs across the United States.
