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Possible new threat to Earth’s ozone layer

Recent increases in an unregulated ozone-depleting substance could delay recovery of Antarctic ozone levels by 5–30 years, say scientists.

A universe of organisms living in your gut

Trillions of microorganisms living in your digestive system might influence your health, mood, even your weight.

Gender, racial bias in astronomy revealed

Research has found that women generally experience subtle, indirect or unintentional discrimination in the sciences. A new survey shows women of color undergo the worst harassment.

Today in science: 1st Telstar launch

Telstar was the 1st satellite to relay television signals between Europe and North America. It launched on this date … and helped change the world.  

Make a pinhole projector for eclipse-watching

You don’t need fancy equipment to watch a solar eclipse. This video shows you how to make a pinhole camera with just a few simple supplies.

How to see anticrepuscular rays

To catch a glimpse of elusive anticrepuscular rays: Next time you see crepuscular rays – sunrays – at sunrise or sunset, turn around.

If greenhouse gas emissions ended now…

Would climate change stop? The simple answer is no. A climate scientist explains.

Earthquake rocks Montana early Thursday

The 5.8-magnitude earthquake in western Montana took place just after midnight, local time. It woke people up near the epicenter and was felt throughout the region. Expect aftershocks.

Do you have what it takes to live on Mars?

If it’s your dream to travel to the Red Planet, check out this video for some things you might want to consider.

How fireworks get their colors

The beautiful colors in fireworks – so good at stirring our emotions – are pure chemistry.