The zen of the underwater treadmill

Something I enjoy: Specialized equipment that looks completely and utterly ridiculous when you watch people using it out of context.

Case in point, this advertisement for the HydroWorx X80 Underwater Treadmill. You have never seen Olympic-caliber runners look sillier. (Sadly, it's not entirely underwater. When I first saw the name of the clip, I was really hoping for guys in scuba gear.)

Also: I've apparently reached the age where current Olympians look to me like they ought to be too young to drive. Crap.

Thanks, Eli Kintisch

Please insert your Sir Mix-a-Lot joke here

Humans' have exceptionally rounded rear ends compared to our primate relatives. Turns out, that beefed-up gluteus maximus helps stabilize our upper body when we run, keeping us from falling forward. Read more about the biology and theoretical evolution of running at the Harvard Gazette. (Via Nicholas Thompson)