In today's episode:

 - Why don't humans take preventative medicine for tick-borne illnesses like animals do? https://www.reddit.com/r/askscience/12gxeaa

 - Why do city pigeons so often have mutilated feet? https://www.reddit.com/r/askscience/12fjlhl

 - Why are there so many pre-modern human fossils from the past several million years, but very few pre-modern chimp or gorilla ones? https://www.reddit.com/r/askscience/12f44oi