Science Channel

Time. It runs, flows, bends, stretches and squeezes. It has a past, a present and a future. But the burning question remains: can we go backwards, forwards or even sideways in it? Discover how the seemingly impossible may become possible in Time Travel.

We are the only species on earth that cooks its food - and we are also the most intelligent species on the planet. The question this documentary asks is: do we cook because we're clever and imaginative, or are we clever and imaginative because our ancestors discovered cooking?

Engineering experts and historians hope to discover new insights into the scientific mysteries of the Roman Coliseum, so they explore the ancient arena to learn the engineering techniques that were used to build it in ancient times. Buried in the foundations is a complex and ambitious drainage system that still works, over 2000 years later.

The experts create an artificial landslide, hoping to find out just how much shifting a pyramid can withstand without toppling.