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Thursday night was fantastic for auroras

Space weather forecasters predicted the possibility of strong geomagnetic storms, resulting in a strong display of the aurora borealis, or northern lights … and they were right!

Human antidepressants found in brains of Great Lakes fish

“Fish are receiving this cocktail of drugs 24 hours a day, and we are now finding these drugs in their brains.”

See an extra-red moon or sun this week?

If you live in the U.S. or Canada, a peculiarly red moon – or very spectacular sunrise or sunset – might be due to smoke from wildfires. Click in for images from Earth and space.

How Harvey churned up, and cooled down, Gulf waters

These maps show how the deluge of fresh rainwater and ocean mixing from hurricane Harvey combined to dramatically alter the surface waters of the Gulf of Mexico.

Dark for 2 years after dino-killing asteroid?

Can you imagine a sky so laden with soot that all of Earth stayed dark for 2 years? New research suggests it happened, at the end of the age of the dinosaurs.

Earliest flying mammals discovered

Two 160 million-year-old fossils discovered in China are the oldest known mammal gliders. “These Jurassic mammals are truly ‘the first in glide.’”

Floods: Not just a coastal issue

As Hurricane Harvey shows, flooding can happen wherever large storms stall and dump lots of rain. A new study finds development is increasing in flood zones far from any coast.

Hidden river once flowed under Antarctica

“Ice, by itself, is only capable of flowing at velocities of no more than tens of meters per year. That means the ice is being helped along. It’s sliding on water or mud or both.”

July 2017 tied with 2016 for hottest July

It was another hot July. Last month was tied with July 2016 as the warmest July in the 137 years of modern record-keeping.

Today in science: Earth from the moon

This is the first photo of Earth from the moon, released in 1966. Later, NASA used modern digital technology to restore the photo to reveal more detail.