Science
Science spans our understanding of how Earth and the cosmos work. Get the biggest news on biology, physics, space, dinosaurs, and more—along with the latest episodes of the Ask Us Anything and Weirdest Thing podcasts.
Latest in Science
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Particle Physics
Inside the discovery that could change particle physics
![The Ask Us Anything logo with a tired runner in the background](https://www.popsci.com/wp-content/uploads/2021/03/31/AUA_Stitches.jpg?w=686)
Ask Us Anything
Ask Us Anything: What causes side stitches when you exercise?
![Two illustrated humans sleeping along with the Ask Us Anything logo](https://www.popsci.com/wp-content/uploads/2021/03/29/AUA_Sleep.jpg?w=686)
Ask Us Anything
Ask Us Anything: How much sleep do you actually need?
![Astronaut Scott Kelly taking a selfie in space](https://www.popsci.com/wp-content/uploads/2021/03/30/scott-kelly-year-in-space.jpg?w=600)
Fitness & Exercise
Spending time in space could shrink your heart
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Ask Us Anything
If The Sun Went Out, How Long Would Life On Earth Survive?
![Smoke stack emitting pollution](https://www.popsci.com/wp-content/uploads/2020/02/14/VXJMS6TSXVALDKKF3IKXGUY7N4.jpg?w=796)
Science
Testing Images
![man and woman in haunted house](https://www.popsci.com/wp-content/uploads/2019/03/18/PFMA32XRLKKZGTPMEHWNFM3SI4.jpg?w=600)
Science
Why is it fun to be frightened?
![Test Page](https://www.popsci.com/wp-content/uploads/2019/03/18/HPHHEXE2FTZXVVRRGQ3S2E6PYE.jpg?w=600)
Science
Test Page
![new shepard launch](https://www.popsci.com/wp-content/uploads/2019/03/18/XVHZCLQCJSLBVLPRDZV6TLCYZY.jpg?w=697)
Science
Facebook Sample
![Quiz Test](https://www.popsci.com/wp-content/uploads/2019/03/18/UKSGCGZAU7B5TTOWVEUCYDH6KY.jpg?w=719)
Science
Quiz Test
![QA 1.76 Sandcastle Testing](https://www.popsci.com/wp-content/uploads/2019/03/18/H3UE5SUHPSKCXIJOV3RFACT5IM.jpg?w=674)
Science
QA 1.76 Sandcastle Testing
![UltraBright 500-Lumen Tactical Military Flashlight: 2-Pack](https://www.popsci.com/wp-content/uploads/2019/03/18/7LUBHS7P2U3C57ZZCHSIML46C4.jpg?w=900)
Science
1.74 Testing QA Only
![bee washing](https://www.popsci.com/wp-content/uploads/2019/03/18/6A6SDVIAEDHJRSCZOONQ7MJNEQ.jpg?w=315)
Science
1.66 Test for Wibbitz
![GoPro Karma](https://www.popsci.com/wp-content/uploads/2019/03/18/T4J4BCHJYSFW57KB5QDOKKWARU.jpg?w=600)
Science