Florida Museum Of Natural History

Thousands of years ago, some of the first Americans knelt beside a pond in what is now Florida. Clutching sharp stone knives, they hacked at the tusk of a slain mastodon, slicing meat away from the long bone. Then, with their work completed, they got up and walked away, leaving behind some tools and the stripped carcass.

Experts say 2015 saw a record-setting 98 unprovoked shark attacks worldwide, including 30 in Florida alone.

Thousands of years ago, some of the first Americans knelt beside a pond in what is now Florida. Clutching sharp stone knives, they hacked at the tusk of a slain mastodon, slicing meat away from the long bone. Then, with their work completed, they got up and walked away, leaving behind some tools and the stripped carcass.

Experts say 2015 saw a record-setting 98 unprovoked shark attacks worldwide, including 30 in Florida alone.