mariana trench

Plastic trash is everywhere. And it's not going away.
A plastic bag was found at a depth of almost 36,000 feet in the Mariana Trench. Scientists say it's the world's deepest known piece of plastic trash.
It's unbelievably mind-blowing to realize the sea is much deeper than even the loftiest part of land above sea level.
Here's what scientists recorded 7 miles beneath the surface of the ocean.