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without the ads. Tom Hartman University Book Club. We're reading today from the last hours of humanity

warming the world to extinction.

This is from chapter four. It's titled The Clathrate Gun.

The deepest part of our oceans is a massive canyon in the West Pacific called the Mariana

Trench.

More than 35,000 feet deep, the pressure of the water is a thousand times that of the

surface of the ocean.

At that depth, the normal submarine would collapse like a paper bag.

There's very little life there, and what does live is adapted to cold pressure and darkness like nowhere else on earth.

The first man to dive solo to the bottom of the Mariana Trench was filmmaker James Cameron,

a lay expert on the oceans in part from his work making the movie

Titanic, Cameron designed funded built, and in 2012 navigated his own submarine, the

deep sea challenger, into these icy depths.

To say that James Cameron understands the ocean in a way that few other human beings ever could

would be an understatement.

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