I guess two would be overkill, not to mention untidy. But the photo below could be how the anatomy was theorised (centaurs being mythical and all). I was too scared to Google this question!
Find the rest of the list here. My favourite is number 12!
Mine have probably been do rats have nipples? can fish get seasick? do bees have ears? how deep is the Mariana Trench? why don’t giraffe sleep?