Lions of the Deep.

Humans are the only creatures with the ability to dive deep in the sea, fly high in the sky, send instant messages around the globe, reflect on the past, assess the present and imagine the future.

Every fish fertilizes the water in a way that generates the plankton that ultimately leads back into the food chain, but also yields oxygen, grabs carbon - it's a part of what makes the ocean function and what makes the planet function.

When I write a scientific treatise, I might reach 100 people. When the 'National Geographic' covers a project, it communicates about plants and fish and underwater technology to more than 10 million people.

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

No water, no life. No blue, no green.