This is 99% invisible.

I'm Roman Mars.

Pete Bethune is a conservationist,

and while that job title doesn't sound exciting,

he's basically GI Joe, but for nature.

He's stopped whalers and the Pacific Ocean. I J. I. He's stopped Whalers out in the Pacific Ocean.

He rescued a dolphin held captive in an Indonesian resort.

Oh yeah. And he's been stabbed twice.

That's the host of Science Versus Wendy Zookerman, who I'm pretty sure. twice. Luck almost ran out. This was just before Christmas. Pete was deep in the rainforest with his team,

and they were looking for evidence of illegal logging and hunting. Picture it. It's a lush forest, thick canopy, very hilly.

But it's up and down, up and down, up and down, really steep.

It's got the most ferocious ants on earth, it's got poisonous spiders.

They are all over the place, and a lot of the trees have very spiky trunks on them, so you need to be really careful walking.

That's P. And while he was walking very carefully through the rainforest, something got him.

I just felt this bang in the back of my leg and my first thought was someone had hit me. Like it felt like someone had a big stick or a piece of wood and and whacked the back of my calf. And then I looked down and then horror I see the snake sort of

recoiling away from me with its sort of head and it was sticking about

two feet off the ground. And as soon as I saw it, like I knew it was a a food-feet off the ground and as soon as I saw it like I knew it was a fertilizer.

The Fertilance or spearhead is the most deadly snake in Central America.

Right away Pete's colleague grabbed his cell phone.

He had one bar of reception and called up emergency services.

They did make it clear, you need to get their guy to hospital as quickly as possible or he is going to die.

Pete had maybe six hours to get to a hospital and to get there he had to dodge all

...