I love music of all kinds, but there's no greater music than the sound of my grandchildren laughing; my kids, too.

When I first ventured into the Gulf of Mexico in the 1950s, the sea appeared to be a blue infinity too large, too wild to be harmed by anything that people could do.

Earth as an ecosystem stands out in the all of the universe. There's no place that we know about that can support life as we know it, not even our sister planet, Mars, where we might set up housekeeping someday, but at great effort and trouble we have to recreate the things we take for granted here.

Meat reared on land matures relatively quickly, and it takes only a few pounds of plants to produce a pound of meat.

Scientists never stop asking. They're little kids who never grew up.

You should know what is taken out of the ecosystem in order to give you a moment's sustenance.

Globally sharks have been killed for their fins, for their cartilage, for their livers, for their meat. But mostly what has driven some species of sharks to near extinction - including the hammerhead shark - is the new luxury taste for shark fin soup.