Arched feet didn't evolve to give us a spring in our step – but to keep us upright, scientists say

Experts used to think the arch was a lever to propel the body forward, but now researchers believe it developed to help us walk on two feet

Evolving an arch across the foot's width helped hominids walk upright

Why did humans start walking upright? How did being bipedal benefit us? - Quora

Tennis - Page 725 - The Telegraph

images.ctfassets.net/mrbo2ykgx5lt/24892/876450e6e5

How did humans evolve to run with shoes or without them? - Quora

Tennis - Page 725 - The Telegraph

Shoes that curve up at the toe require less muscle work, study shows

Neuroma! Triple Threat. — The Gait Guys

Evolution Cruncher.pdf - Evolution Is Dead!

These Trees Say So Much: Hubbard Brook Experimental Forest in North Woodstock, New Hampshire - New England