The Ebola virus. No-one knows exactly where it comes from but one thing is certain - it's one of the most virulent infections known to science. This special episode of Horizon meets the scientists and doctors from all around the world looking for the cure and hears first-hand accounts of what it's actually like to catch - and survive - this terrible disease.
A treatment method that overturns a common sense of the medical community that "the brain cell does not regenerate" has been developed in Japan, and its practical application is imminent. The key to the treatment are "stem cells", which regenerate various body tissues on a daily basis. Japanese researchers have discovered that stem cells, which have been thought to be absent in adult brains, actually exist in small numbers. A therapy that stimulates brain stem cells in an innovative way and regenerates the brain is entering the final phase of a clinical trial.
Panorama looks at the breakthrough that could change the lives of everyone and everything on the planet. Gene editing is revolutionising medical research and could deliver new treatments - even cures for a host of diseases. It also gives scientists control over evolution, allowing genetic changes to be forced through species. But some are worried about letting the gene genie out of the bottle.
What are the principles behind Homeopathy and does it work?
Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.