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
![Person in gray exercise shirt and pink running tights with a side stitch](https://www.popsci.com/wp-content/uploads/2019/03/18/PCWGLJXCGHPYGIZ7HSMPR7QPCU.jpg?w=675)
Ask Us Anything
When you get a stitch in your side, what’s really going on?
![Why do marathon runners get the runs?](https://www.popsci.com/wp-content/uploads/2019/03/18/IVQ6XKMTOPOGVRML3S6PH35E2E.jpg?w=675)
Ask Us Anything
Why do marathon runners get the runs?
![Will cracking my knuckles give me arthritis?](https://www.popsci.com/wp-content/uploads/2019/03/18/UXTW6P2ARE3SU7Q3SJ37RRCU3I.jpg?w=600)
Ask Us Anything
Will cracking my knuckles give me arthritis?
![Antibiotic pills which are one of the causes of recurrent UTIs](https://www.popsci.com/wp-content/uploads/2019/01/07/VYPI5ZDEEQSD3H5WZAXUYN6QQ4.jpg?w=763)
Ask Us Anything
Why your UTI keeps coming back
![Why do my muscles ache the day after a big workout?](https://www.popsci.com/wp-content/uploads/2019/01/03/BPGXVQ7DAJYOQI6TT2FPQTAJ3A.jpg?w=679)
Ask Us Anything
Why do my muscles ache the day after a big workout?
![art illustration with a bushel of apples](https://www.popsci.com/wp-content/uploads/2021/10/13/AUA_apples.jpg?w=686)
Ask Us Anything
Did food taste better 50 years ago?
![Here’s what caused the mysterious blue glow spotted from the ISS](https://www.popsci.com/wp-content/uploads/2021/10/12/nasa-blue-glow.png?w=800)
International Space Station
Here’s what caused the mysterious blue glow spotted from the ISS
![Chaos spelled in Scrabble pieces](https://www.popsci.com/wp-content/uploads/2021/10/08/chaos-scrabble.jpg?w=600)
Climate Change
Chaos is more predictable than you think
![the sun as seen with x-rays](https://www.popsci.com/wp-content/uploads/2013/07/05/PIA18906_orig-scaled.jpg?w=886)
Ask Us Anything
What would happen if the sun went out?
![art illustration of the sun](https://www.popsci.com/wp-content/uploads/2013/07/06/Screen-Shot-2021-10-05-at-4.45.55-PM.png?w=687)
Ask Us Anything
What happens when the sun burns out?
![the sun as seen with x-rays](https://www.popsci.com/wp-content/uploads/2013/07/05/PIA18906_orig-scaled.jpg?w=886)
Ask Us Anything
How close can you get to the sun? Closer than you’d think.
![art illustration of person reaching for their toes](https://www.popsci.com/wp-content/uploads/2017/10/29/AUA_toetouch.jpg?w=686)
Ask Us Anything
Why can’t we all touch our toes?
![a nose smelling the stars (illustration)](https://www.popsci.com/wp-content/uploads/2021/09/27/AUA_smell_space.jpg?w=686)
Ask Us Anything