| Why do hippos have these dents in their skin where hair are | 3279 | SwordThiefOfStars | | | | |
| Why female chimpanzees and gorillas don't have breast? NSFW | 1300 | victoria_polishchuk | | | | |
| In the vulva, at the spot where women have "Glans clitoris", what do men have that corresponds to its location? NSFW | 994 | Connect_Reply_888 | | | | |
| how do the kidneys work so fast | 406 | RadNharwhal47 | | | | |
| What's the evolutionary benefit of males' voices dropping? | 325 | HuckinsGirl | | | | |
| Why is botulinum toxin so incredibly lethal? | 312 | Accelerator231 | | | | |
| How is this possible? | 229 | Emolz24 | | | | |
| Can non mammals feel cuteness, and if so from what | 220 | Bramoments | | | | |
| How do we know for sure how many years it's been since dinosaurs were extinct? | 211 | victoria_polishchuk | | | | |
| What's one of your favorite species name? | 198 | KnoWanUKnow2 | | | | |
