Uranus and Neptune

THE OTHER BLUE PLANETS  Uranus (left) and Neptune (right) have not been visited since Voyager 2 sped by in the late 1980s. Many researchers argue that it’s time to go back.

floating microbes

HITCHHIKER A microscopic diatom latches onto a tiny plastic piece from the Sargasso Sea (colors added). 

raspberry leaf and microbes

This raspberry leaf (in a closeup, colorized electron micrograph) is covered in a biofilm of bacteria and fungi. Rosmarinic acid may keep bacterial visitors from overtaking a plant.

depression

DARK DAYS  A controversial new study concludes that major depression does not afflict more people during winter months.



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