(NASA)
Health and Science
NASA sees evidence of ozone protection from CFCs
Chlorofluorocarbons (CFCs) and other ozone-depleting chemicals are threatening the ozone layer. Atmospheric scientists explain the Montreal Protocol's impact.
Read More
Up next in Science
promo
2:37
NASA sees evidence of ozone protection from CFCs
promo
2:37
6 geniuses who didn’t get the credit they deserved — at first
promo
3:14
Why does the moon look so much bigger when it's on the horizon?
promo
3:30
Do you love your houseplants? Then you need to re-pot them. Here's how.
promo
2:23
Researchers designed a fitness test to predict longevity. Could you pass it?
promo
2:21
Is extreme weather related to climate change?
promo
7:08
Why is 'The Masked Singer' so addictive? We asked a psychology professor and comedian Ken Jeong.
promo
5:10
B. Smith's illness was taking a toll on her husband. Then he found another love.
promo
2:13
We tried folding like Marie Kondo. Here's how it went.
promo
2:27
Here’s why some people who think they know it all don’t
promo
1:30
Why some people are afraid of spiders
promo
4:39
Your at-home DNA test results could be used to solve cold cases
promo
6:24
Why would anyone milk a hippo? For science.
promo
6:51
Explore the Solar System with Bill Nye
promo
5:16
Meet the real sea monsters that swam the ancient oceans
promo
1:58
Scientist claims he’s created gene edited babies. Most scientists are shocked and skeptical.
promo
1:29
What is adenovirus?
promo
6:59
What sounds did dinosaurs make? And what colors were they?
promo
7:10
Dealing with anxiety as a kid
promo
4:15
These kids made science projects that could change the world
promo
1:26
Focusing on the bad: Here's why we notice — and remember — negative things