Rivers began pumping weathered material into the sea about a billion years after Earth formed, suggesting continents may have gotten an early start.

New images released by the U.S. Navy's Naval Sea System Command Supervisor of Salvage and Diving show the mangled remains of the Francis Scott Key Bridge at the bottom of the Patapsco River.

Rainwater and wind carries plastic waste into streams and rivers, and through drains ... How does plastic get into the ocean? The bottom line is us. Whether we mean to litter or not, there's always a ...