Thanks for the informational post. Having an upright posture was theorized to be an adaption for running. Human beings are some of the best long-distance runners in the entire animal kingdom due to our efficient bipedal gate and ability to sweat and remove heat easily.
It's covered in a lot of detail in Born to Run if you want to check it out.
Thanks! I appreciate it!
Born to Run is a great book. Christopher McDougall did an outstanding job showing that we're the absolute best species on the planet when it comes to long distance running.
I'll probably write a blog post about sweating soon too, because like you said, it's an incredible adaptation that allowed us to do so, so much!