Mastodons were among them.

So were mammoths, though mammoths preferred more open, grassland-like environments than the forested margins where mastodons browsed.

Giant ground sloths, which could reach the size of modern elephants, were present.

Short-faced bears — the largest bears ever to live in North America, substantially bigger than modern grizzlies — occupied the landscape.

American horses and camels, different from their Old World relatives, were part of the fauna.

The people who lived in this landscape — who may have been responsible for driving a bone projectile point into the rib of a mastodon near what is now Sequim, Washington, approximately 13,900 years ago — were not living in a world that has any close modern equivalent.