R Askscience - 48 Hours
- AskScience AMA Series: I'm a political psychologist. We found that the more young men fear for their future, the more authoritarian their - 7 hours
- What's between solid, liquid and gas? - 22 hours
- Ask Anything Wednesday - Engineering, Mathematics, Computer Science - 23 hours
- Where do the bones in a fetus come from? - 38 hours
- If you spiraled into a supermassive black hole, would you witness the heat death of the universe due to time dilation? - 43 hours