Gut Microbiome
Gut bacteria are key players in everything from arthritis to depression.
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Indoor Air
Scientists are only starting to understand the complex chemistry of our indoor spaces.
Lost & Found Spacecraft
An amateur radio operator tracks down a lost spacecraft.
Moving Muscles
A little dopamine at the right moment is all muscles need to get moving.
Anti-Tripping Circuit
Scientists discover a brain circuit that keeps us upright after stumbling.
Energy Saving Homebodies
As Americans spend more time at home, overall energy use is dropping.
Why Are Plants Green?
The dominance of green chlorophyll on Earth may have come after a more purple period.