James Stewart

The print was humanoid, yet not quite human.

About 13 inches long, unusually broad, with a divergent big toe that looked almost like a thumb.

The print was just one of many.

In fact, Shipton and Ward followed these tracks for a mile, which is no mean feat at an altitude above four and a half thousand meters.

What made these marks in the remote heights of the Himalayas?

Could it really be a yeti?

And if not, well, what on earth was it that these esteemed mountaineers saw?

I'm James Stewart and you're watching Asteroom Earth.

Now I know what you might be thinking, why is he making a video about yetis?

Clearly there's no way these things can be real, right?

And I would have agreed with you, really, I would.

But something about yetis has just always bothered me.

Every year there's a new story, a new discovery, a new leaked picture somewhere online.

And how can there be this much smoke without fire?

If it's not a Yeti that we're seeing, then it has to be something else.

And I want to know what that is.

That's just how my brain works.

So join me in this video as we delve into the world of the fabled Yeti and meet its Amazonian equivalent, known as the Mapinguari.

How is it that centuries-old rumours of their existence still circulate?

Is there any truth behind the swathes of evidence?