I hope that someday we will find evidence that there is intelligent life among humans on this planet.

This much is certain: We have the power to damage the sea, but no sure way to heal the harm.

With care and protection, with safe havens in the ocean, there is still a good chance that we can turn things around.

What we put into the atmosphere in terms of burning fuel is unprecedented.

As a child, I was aware of the widely-held attitude that the ocean is so big, so resilient that we could use the sea as the ultimate place to dispose of anything we did not want, from garbage and nuclear wastes to sludge from sewage to entire ships that had reached the end of their useful life.

Every time I slip into the ocean, it's like going home.

The diversity of life on Earth, generally, is astonishing. But despite those large numbers, it's also important to recognize that every species, one way or another, is vulnerable to extinction. And in our time on Earth... our impact on the diversity of life has been profound.