- How did evolution ever lead ostriches to hide their head in the sand when an enemy approaches?
- When did humans stop evolving?
- Why did evolution create a chicken that lays so many unfertilized eggs when that is so wasteful?
- Why do humans crave sugary foods? Shouldn't evolution lead us to crave healthy foods?
- Why do humans have an appendix even though it is unnecessary?
- Why do my fingers absorb water and become wrinkled?
- Why does evolution always lead to more advanced species?
- Why have humans evolved to be taller over the last three hundred years?