Most theories put it down to our heat dissipation, which is really good compared to other mammals. Here's an older reference, an article about the Born to Run b

Most theories put it down to our heat dissipation, which is really good compared to other mammals. Here's an older reference, an article about the Born to Run book: https://www.nytimes.com/2009/10/27/health/27well.html https://www.nytimes.com/2009/10/27/health/27well.html Another useful google term is endurance hunting (theorized to be why humans are slow and weak, but have superior endurance)