The ocean drives climate and weather, regulates temperature, absorbs much of the carbon dioxide from the atmosphere, holds 97 percent of Earth's wate… - Sylvia A. Earle

Astronomer Carl Sagan noted that even when it is viewed from so far away that it is a pale dot, Earth is discernibly blue.

Far and away the greatest threat to the sea and to the future of mankind is ignorance. But with knowing comes caring, and with caring, the hope that maybe we'll find the Holy Grail of understanding, strike a balance with the natural systems that sustain us, and thus achieve an enduring place for humankind on a planet that got along without us for billions of years and no doubt could do so again.

Diving into the ocean, it’s like diving into the history of life on earth, not just over the last 50 or 1,000, but the last million, 10 million, 100 million years, because creatures are there that have been there for several hundred million years, not those same creatures, but their near relatives, like jellyfish; like — well, sharks have been around for 300 million years; horseshoe crabs, creatures that lured me into the ocean as a child in New Jersey, have a history that goes back at least 300 million years; so many forms of life that were found in the ocean long before there were multicellular creatures occupying space on the land.