Arched feet didn't evolve to give us a spring in our step – but to

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

What Works for Plantar Fasciitis? What Doesn't? Why?

Evolution - The Telegraph

The Shoe Cushioning Myth

Retracing Slavery's Trail of Tears, History

Flat feet - Wikipedia

Fossil foot bone shows our ancestor had two feet firmly on the ground, Anthropology

Overlooked arch in the foot is key to its evolution and function

Run Faster and Jump Higher with these Proven Foot Stretches

Curved toes point to sore feet, the chaos of the knuckleball – Physics World

Can a Jellyfish Unlock the Secret of Immortality? - The New York Times

Tennis - Page 725 - The Telegraph