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How tiger sharks are helping seagrass
A heatwave in 2011 killed off seagrass beds in Shark Bay, Australia. Now, scientists have discovered that tiger sharks are helping the ecosystem recover.
November 15, 2017
Scientists find teeth of early human ancestor
A remarkable find of fossil teeth from tiny, furry-tailed creatures - thought by scientists to be a human ancestor - dating back 145 million years.
November 14, 2017
Will 15 days of darkness start November 15? Nah
Are you ready for 15 days of darkness, November 15-30? No need to be. It's a hoax.
November 13, 2017
When mammals switched from nights to days
Mammals once were night creatures. A new study suggests they became active in daylight after the dinosaurs went extinct, 66 million years ago.
November 12, 2017
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
