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Twitter data takes snapshots of mood of New York City
On the whole, tweets are most positive near public parks like Central Park. They're most negative near transportation hubs such as the Brooklyn Bridge and the airports.
August 21, 2013
CME and sun-diving comet
A coronal mass ejection (CME) erupted from the sun's far side on August 20. At nearly the same time, a small sun-diving comet met its end.
August 21, 2013
Tiny fish widens false eye on fins to distract predators
A science team in Australia has the first clear evidence that damsel fish can change the size of both a false eye and their real eye to maximize chances of survival.
August 20, 2013
Tracking the Chelyabinsk meteor dust plume
The meteor that plunged through Earth's atmosphere over Russia on February 15, 2013 lasted just moments. But it created a belt of dust that persisted for months.
August 20, 2013
Look for bright nova in constellation Delphinus
It's the brightest nova since 2007, and may remain visible to the unaided eye for weeks to come.
August 20, 2013
Nevada rock carvings may be oldest in North America
Rock carvings in western Nevada could be the oldest known North American petroglyphs, perhaps as much as 14,800 years old.
August 20, 2013
Comet ISON’s path across our sky
This chart shows how we on Earth see Comet ISON in front of the background stars, as it falls toward the sun, moving from the outer to the inner solar system.
August 20, 2013
Bland, mushy apples, brought to you by climate change
A 40-year study finds tart, crisp apples are losing their zing, and that rising temperatures may be the cause.
August 19, 2013
On this planet, a new year every 8.5 hours
Researchers have discovered an Earth-sized exoplanet that whips around its host star in a mere 8.5 hours — one of the shortest orbital periods ever detected.
August 19, 2013
Hot Jupiters and their unexpected, exotic characteristics
Hot Jupiters are giant exoplanets orbiting close to their stars, surprising astronomers with strange and unexpected characteristics.
August 19, 2013
