News
- Animals
Butterfly’s clock linked to compass
The most detailed look yet at the monarch butterfly's daily rhythm keeper suggests it's closer to ancient forms than to the fruit fly's or mouse's inner clock.
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- Health & Medicine
Night lights may foster cancer
Regularly working through the night appears to come at a steep cost—a heightened risk of cancer.
- Humans
Transport emissions sizable, and rising
Almost one-sixth of the carbon dioxide produced by human activity since the beginning of the Industrial Revolution resulted from the transport of goods and people—an emissions fraction that's increasing by the year.
