地球是我们赖以生存的家园，她为我们提供了生存所必需的物质——氧气和水。她用慈母般的温情哺育了一代又一代的人。当我们恣意地享受地球给予的一切时，是否已经了解地球了呢？地球的力量到底有多大！

Of all our planet’s forces, perhaps none has greater power over us than water. For me, water is the most magical force on earth. The presence of water shapes, renews and nourishes our planet.

Oh, my God ! You get all wet there!

It’s our planet’s lifeblood. It pumps through it continuously, delivering vital ingredients for life.

Ah,it’s glorious!

Water makes us alive. Yet, water is just one of the ways that the power of the planet has shaped our lives. The earth has immense power and yet that’s rarely mentioned in our history books. I’m here to change that. I’m exploring four great planetary forces that have influenced our history.

The power of the deep earth; the few technological innovation-wind, that has shaped the fate of entire continents; and fire, which gave us the power to conquer the planet.

But I’m going to start with water, the magic of water is that it’s constantly transforming itself, shifting between guises and from place to place, our struggle to control it has been behind the rise and fall of some of the greatest civilizations on earth.

The center of the Sahara Desert in North Africa, one of the driest places on earth.

I’m over six hours drive from civilization. Temperatures here regularly reach 100 degrees Fahrenheit, but there’s less than half an inch of rainfall each year.

Ah,the whole things are moving. It’s like walking on water.

Yet, hidden amongst these dry dunes are clues that point to the dramatic influence the planet has had on human lives.
I’ve come here because although you’ll never know it, the story of this place is all about water. The clues are etched into that rock face there. Prehistoric rock outdating about 6,000 years in the pattern of the almost unlikely characteristics you’ve ever seen.

Whoa, what is that? Is it a giraffe? It’s a giraffe. Look at that, here is a neck, here is its ear. Look at that, it’s an eye, isn’t it? That’s really natural, isn’t it? And that looks like a giraffe, dipping its head/ and drinking some water. We’ve got a herd of giraffes here.

Looks like two cats. They are fighting. That, what is that? Looks like a figure of, a figure of a man who’s wearing a burqa. And that’s clearly a crocodile which is especially odd here, that’s an aquatic animal. It doesn’t just paddle around. It needs a lot of water to live in. I find all the creatures that are depicted on these rocks are not desert animals. They need wet conditions.

In such a parched wilderness, how can this be? The only explanation is that 6,000 years ago, this place was wet. Once you know what to look for, the evidence is all around.