| can you siphon liquid through a tube if the two containers are at the same height? | 1 | | | | |
| What is a chimpanzees usual cause of death in the wild? | 1 | | | | |
| What are the common causes of natural death amongst chimpanzees/orang-utans/gorillas etc...in the wild? | 1 | | | | |
| Why do squirrels start humping trees when you are near them? | 1 | | | | |
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