News
- Animals
Invasion of the salmon
Chinook salmon, dwindling in the United States, go wild in South America.
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- Health & Medicine
Take a nap
A nap is the most effective way to combat an after-lunch slump, but caffeine will help too.
- Paleontology
Ancient burrows
Triassic-era sediments unearthed in Antarctica reveal the well-preserved lair of a four-legged, mammal-like reptile.
- Paleontology
A mammoth divide
Woolly mammoths roamed Siberia in two distinct clans, and the split between the groups, scientists say, is surprisingly deep, occurring more than 1 million years ago.
- Health & Medicine
Sun up
Men with lower concentrations of vitamin D have higher risk of heart attack.
- Life
Simple body, complex blueprints
Genes key to the development of modern animals' body plans show up in primitive-looking comb jellies.
- Health & Medicine
Wake up and smell the java
The smell of coffee leads to changes in gene activity in sleep-deprived rats, hinting at the molecular basis for the relaxing effect of the aroma seen in experiments.
- Archaeology
Acrobat’s last tumble
Sacrificial offerings in an ancient Mesopotamian building included a beheaded acrobat, a new skeletal analysis suggests.
- Space
Sizing up black holes
ST. LOUIS—Astronomers are all wound up over a new method for sizing up supermassive black holes found at the cores of galaxies. The method allows researchers for the first time to estimate the weight of these black holes in spiral galaxies up to 8 billion light-years away, or halfway across the universe, reports Marc Seigar […]
- Space
Outsiders look in
Astronomers stitch together the most detailed infrared picture of the inner Milky Way.
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