When Charleston resident Grant Martin found his first shark tooth on a Hilton Head Island beach when he was a kid, he thought he discovered one of the greatest secrets in the world.

I dove into one of the busiest rivers in Texas, and it did not disappoint. In just one session, I found a wallet, three phones, sunglasses, and a pile of other lost items. With so many visitors ...

While scuba diving in a lazy river, I focused on cleaning up trash left behind underwater. Hidden beneath the debris, I found ...