Top Network Posts
- 41Why does evolution not make our life longer?
- 21Are there birds with knees instead of elbows?
- 19What kind of bird species is this?
- 18Why are not all species hermaphrodites?
- 15What is the armpit hair for?
- 14What happens when we know that there is something that we forgot but we can't remember what it was?
- 14How do people who have lost both of their legs produce red blood cells?
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