Would you be better off with ostrich feet?
16 February 2013 Last updated at 07:47 GMT
Our feet are incredibly badly designed, according to a researcher speaking at a US science conference in Boston.
Professor Jeremy DeSilva, is an assistant professor in the anthropology department at Boston University, explained that human's would be better off with Ostrich feet.
The BBC's science correspondent, Pallab Ghosh reports from the Boston campus.
First broadcast on BBC Radio 4's Today programme on Saturday 16 February 2013.