R Askscience - 48 Hours
- How do microbes first enter our body? - 5 hours
- Were humans the only hominids to cook food, or did other species arrive at it independently? - 5 hours
- Is it possible to have an ice age while in a greenhouse earth? - 10 hours
- Why is ice less dense than water? - 31 hours
- Do Elephants breathe primarily out of their mouth or their trunk? - 36 hours
- Is it possible to use seismic (in this case, from asteroid impacts) monitoring to learn what the Moon is made out of? - 37 hours