"Deep-Water Dive Reveals Spilled Oil On Gulf Floor"

"When the BP oil well blew out earlier this year, the 4 million barrels that flowed into the sea didn't simply vanish. There's growing evidence that a good portion of it sunk to the bottom of the Gulf of Mexico, where some of it remains.

To get to the sea floor a few miles from the blown-out Macondo well, we clamber into a titanium-hulled submarine named Alvin and are gently hoisted off the deck of its mother ship, the Atlantis, into a surprisingly blue and inviting Gulf of Mexico. Mike Skowronski is our pilot.

As we descend, the water turns from bright blue to cobalt, twilight to black. Samantha Joye, a researcher from the University of Georgia, and I press our faces to our tiny windows and watch as glowing animal life streams by."

Richard Harris reports from submersible Alvin at the bottom of the Gulf of Mexico November 29, 2010.