The researchers had to suit up just to enter it.

Well this was really cool.

I'm taken back to the boat, I'm given a gas mask

He bleeds out pigs.

And here's the weapon, it seems, that it did so over the last 500 million years.

sulfuric acid.

Six hours later, up goes the temperature.

And here's the really important point.

More recently, into the Black Sea, where we're exploring.

You're in an accident.

But there's a far worse danger confronting us.

It's a liquid sulfur.

This geo engineering idea, in it's simplest form, is basically the following.

This is what accumulates in the tar sands of

Embedding nanoparticles in a material for instance, always.

And with money we got from DARPA, we could show just that.

We inject our own aerosols into the atmosphere, and we have trace gases, and not just carbon dioxide it's methane, ozone, oxides of sulfur and nitrogen.

They stop complex life from existing.

like gasoline or sulfuric acid, methane, and nylon.

You might be wondering, what does SDS PAGE even stand for.

The drive plate was badly repaired, it blew, and the entire crew was subjected to a lethal dose of cadmium 2 before I could seal the area,

We have to go in with protective suits and breathing gear, and 30 parts per million of H2S will kill you.

Peter Ward

And so, I added B vitamins, sulfur and antixidants to my daily regimen.

I don't know if anybody might hail from northeastern Pennsylvania, but this is where I spent my first 19 years with my little young lungs.

And so we thought, like in a game of musical chairs, might we be able to give a person some hydrogen sulfide, and might it be able to occupy that place

And so, we wanted to find out might we be able to use hydrogen sulfide in the presence of cold, and we wanted to see whether we could reproduce this skier in a mammal.

A lot of hydrogen's produced today in the world.

Demerol is a morphine sulfate. It is soluble in water.

It's also extremely important to lubricate the chuck once a day using 2 or 3 pumps of grease per jaw

lives inside the equivalent of battery acid, and excretes sulfuric acid.

Decaying flesh and sulfur.

And the worst effect of global warming, it turns out hydrogen sulfide being produced out of the oceans.

Your liver and kidney need sulfur so they can remove toxins from your blood stream.

Daily surface temperature is topped off at 465 degree celsius.

From iwo jima.Made a movie about it,actually.

At the end of the Permian, at many of these mass extinction boundaries, this is what we find isorenieratene.

And then we have two parameters which we were not able to quantify air pollution, including warming gases and air polluting sulfates and nitrates, but also chemical pollution.

There is tremendous amounts of hydrogen sulfide coming into this cave from volcanic sources and from the breakdown of evaporite minerals below the carbonates in which this cave is formed and it is a completely hostile environment for us.

Sulfur burns with a blue flame.

Sulfur is used to make matches.

But it will damage some places.

Am I understanding you right, that what you're saying here is that we have in our own bodies a biochemical response to hydrogen sulfide that in your mind proves that there have been past mass extinctions due to climate change?

It's filled with this toxic gas, hydrogen sulfide.

So, it was interesting for us when we applied hydrogen sulfide to a mouse when it was also cold because what happened is the core temperature of the mouse got cold.