Running: Barefooted (Part 4)
I consider running in a novel way, but one that's as natural to humans as are the undulations of flying to sparrows, and swimming to elephant seals. That means regardless of medium, on this planet, horizontal locomotion requires us to hitch a ride with gravity.
run barefooted consider run novel way natural human undulation fly sparrow swim elephant seal mean regardless medium planet horizontal locomotion require hitch ride gravity