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Cloud shadow mystery … solved?
We published a photo last Tuesday, showing a mountain's shadow. We wondered what caused it. Now - with the help of the EarthSky community - the mystery may be solved.
November 12, 2017
What makes zombie ants obey
Zombie ant fungus doesn't attack ants' brains. Instead, the fungus invades an ant's entire body, forming an interconnected 3-D network, forcing the ant to move.
November 9, 2017
Want birds in your yard? Plant native trees
A recently published study confirms that native trees are most effective in hosting caterpillars, an important food for birds.
November 8, 2017
Why do trees shed their leaves?
Trees shed their leaves in order to survive cold or dry weather. The trees pull in the nutrients from the leaves before the cells cut off the leaf.
November 8, 2017
2016 greenhouse gases at record high
As climate talks open in Bonn, Germany this week, negotiators are considering a report from the World Meteorological Organization, urging action now.
November 7, 2017
2017 ozone hole smallest since 1988
This year's ozone hole peaked in September at its smallest observed extent since 1988, due to an unstable and unusually warm Antarctic vortex in 2017.
November 7, 2017
Twin Yellowstone super-eruptions altered global climate
The Yellowstone supervolcano's last eruption wasn't a single event, but 2 closely-spaced eruptions that put the brakes on a natural global-warming trend, says a study.
November 2, 2017
Smokey sunset skies over Italy
These swirling, intense red sunset skies are due to ongoing wildfires in northern Italy.
October 30, 2017
Blue jets, red sprites and other flashes
In recent years, the International Space Station has given astronauts the chance to photograph transient luminous events - or TLEs - natural light shows produced at the tops of thunderstorms.
October 26, 2017
How cold and wet this winter in the US?
La Niña (or not) is the biggest wildcard in how this year’s winter might shape up. Overall, NOAA's outlook suggests a relatively cool, wet U.S. North - and warm, dry U.S. South - this winter.
October 23, 2017
