The lake is about 25 meters deep.

And the water will go where it should go.

The pond is 3 meters deep.

That is 9,300 fathoms down.

And I had to overcome my fear of deep water to find this one.

I had never seen black water before.

A depth of 40 meters...

These raised up platforms just like this stage.

Say you and your buddy are left alone at a depth of 40 meters.

You and your buddy are alone at a depth of 40 meters.

A depth of 40 meters... Just you and your buddy.

(Laughter)

There is a problem with scuba, though, in that it imposes some limitations on how deep you can go.

It's a very deep water part of our planet.

It took me about two and a half hours to dig a hole one meter in diameter and two meters in depth.

The sperm whale can dive to a depth of 1,000 meters.

An emergency return to the surface from 40 meters.

The calving face is the wall where the visible ice breaks off, but in fact, it goes down below sea level another couple thousand feet.

Would it fill the building?

If you look up at the top, that's a parking lot, and those are recreational vehicles right there.

So it has to travel 400 meters.

A rescue exercise at 40 meters.

Shaped like a rectangle.

It crossed this entire train then it went another 200 meters.

Velociraptor? Yes. Good shape, too.

Over time, those gas molecules dissolve into your blood and tissues and start to fill you up.

largest diameter is nine feet

So that's the column of soldiers right there.

So train a is like that.

And there's another one there, there, back over there.

So for example, if this radius equals 25 meters, then this would be 50 meters.

It's the first working prototype of the clock.

Those white cliffs are a dense Cambrian limestone.

This is the target site, the world's deepest hydrothermal spring at Cenote Zacaton in northern Mexico.

So, relative to this train, we move from right here, we move 400 meters.

She finally narrows her search to two plots that both have good locations.

The plot at 314159 Apple Lane has a width of 30 meters and a length of 40 meters.

It is thirty meters in length.

It's absolutely pitch black, because photons cannot reach the average depth of the ocean, which is 12,000 feet.

meters

Depth

Depth

And then train A has passed train B. 200 meters.

It's going to be 8 meters.

I'd say at least eight, no, more like 10 feet!