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Posts by
EarthSky Voices
TESS spacecraft is finding hundreds of exoplanets
... and it's poised to find thousands more. But will we find another Earth?
November 7, 2019
Why don’t evergreen trees change color and drop their leaves?
As temperatures drop, broad-leafed deciduous trees – think maples and oaks – withdraw the green chlorophyll from their leaves. Their leaves turn colors and fall. Evergreens solve the problem of winter in a different way.
November 1, 2019
Is daylight time worth the trouble?
This is the weekend we "fall back" here in the U.S. Are you glad? Sad? Mad? Advocates say daylight time saves energy and wins wars. Studies show injuries and illnesses rise when clocks change.
November 1, 2019
Did an asteroid collision cause abrupt Earth cooling?
What kicked off a rapid cooling on Earth 12,800 years ago? Some geologists believe a fragmented comet or asteroid collided with Earth and caused the change. Read more from a scientist whose fieldwork at a South Carolina lake adds to the growing pile of evidence.
October 28, 2019
Tiny stature of extinct ‘Hobbit’ thanks to fast evolution
New research suggests that the tiny human species - that survived until about 18,000 years ago, later than any human species other than our own - evolved its small size remarkably quickly while living on an isolated island.
October 16, 2019
How deep is the ocean?
On average the ocean is 2.3 miles (3.7 km) deep, but many parts are much shallower or deeper. In the deepest zones, life forms have adapted to live in the dark, under crushing water pressure.
October 10, 2019
10 amazing places for year-round stargazing
The stars are accessible to everyone, but where can you get the most from the night sky? Here are 10 great dark-sky places - mostly in the U.S. but also in Australia, New Zealand and Chile - for skywatching and stargazing.
October 9, 2019
Scientists start mapping universe’s hidden web
Maps of the long filaments of gas that hold the universe together might one day help trace and unveil dark matter.
October 8, 2019
What climate change in the Arctic means for the rest of us
Air temperatures in the Arctic are increasing at least twice as fast as the global average due to climate change. What worries climate scientists about this?
September 30, 2019
Why we need to get back to Venus
This hot neighbor, with its surface veiled by thick clouds, hasn't benefited from the attention showered on Mars and the moon. But Venus might offer insights into Earth's future.
September 25, 2019
