Wrinkles on wet skin could have helped early humans collect
food from wet places, like streams. Wrinkles on wet fingers could have helped them hold
on to slippery objects better. And wrinkles on toes could have helped our ancestors' bare
feet grip smooth, wet surfaces, similar to how tire ridges help tires grip slippery roads.
Wrinkles that appear on our wet fingers make it easier for us to pick things
up.
Animals, plants, and humans all adapt to their environments in many
different ways.
The wrinkles that appear on our wet fingers and toes may have been useful
to our ancestors.