askscience

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The Mars rover found that Martian soil is composed of about 2% water. How significant is this number? What about compared to the Sahara? What else should we expect after finding this water on Mars?	2301
Rain has a distinct smell. What is it that we are smelling and why does it happen?	24
How do our senses, like taste and smell, know what are good senses? Are we conditioned to know that freshly baked cookies smell delicious or is there a deeper science? Why does cooked meat taste better than raw, for the most part?	9
Has there been, on any occasion other than poaching, destroyed habitat, or nature, a species that was put into extinction, by humans, just for being a burden to the environment?	5
How does a galaxy, like the Tadpole Galaxy, form? A large, seemingly regular galaxy, but has a 280 thousand light year long tail of stars behind it.	3
What would it be like to live in a singularity point prior to the hypothesized big bang? (Hypothetically)	1
Why, when I have a sexual dream, I never "finish," no matter how long it's been going on or how close I think I am? (Nsfw) NSFW	1
My chemistry professor said that a law is experimentally DERIVED, not proven. Are there any laws that were taken out, modified greatly, or just shown to be wrong in their field?	1
How can trees, like giant redwoods and giant sequoias, grow to be so enormously large? Why don't they get to the point to where their size is too large to self-sustain?	1
Only 1.38 percent of the atomic bomb detonated over Hiroshima. (About the weight of a bank note) Why was this value so little? Why did they use so much more uranium than that was able to detonate? Or was this percent known before the detonation, and the amount was adjusted accordingly?	1

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