There is a strange and mysterious world that surrounds us, a world largely hidden from our senses. The quest to explain the true nature of reality is one of the great scientific detective stories. Clues have been pieced together from deep within the atom, from the event horizon of black holes, and from the far reaches of the cosmos. It may be that we are part of a cosmic hologram, projected from the edge of the universe. Or that we exist in an infinity of parallel worlds. Your reality may never look quite the same again.

Twenty years on from the invention of the world wide web, this major new series takes stock of its profound impact – how, for better and for worse, the digital revolution is reshaping our lives. Dr Aleks Krotoski explores the meaning of a phenomenon that is transforming everything, from how we learn to how we shop, vote and make friends. With a quarter of the planet connected so far, this series examines what is in store for the remaining 75 per cent of the world's population as they come online." In the first part series, Aleks charts the extraordinary rise of blogs, Wikipedia and YouTube, and traces an ongoing clash between the freedom the technology offers us, and our innate human desire to control and profit. Dr Aleks Krotoski looks at how it is reshaping almost every aspect of our lives. Joined by some of the web's biggest names - including the founders of Facebook, Twitter, Amazon, Apple and Microsoft, and the web's inventor - she explores how far the web has lived up to its early promise.

Follow three professional gamers from around the world as they compete for a million dollar prize in the first Dota 2 International Tournament. In recent years, E Sports has surged in popularity to become one of the most widely-practiced forms of competitive sport today. A million dollar tournament changed the landscape of the gaming world and for those elite players at the top of their craft, nothing would ever be the same again

Earth may seem like the most hospitable planet in the solar system. But look again. Startling new discoveries reveal the blue planet has been plagued by more chaos and destruction than scientists once imagined. Stand on the Earth billions of years ago as a primitive planet called Theia slams into it. Shiver as our entire globe is frozen over like a gigantic snowball. Feel the heat as mammoth volcanoes scorch the landscape and darken the sky. From a cosmic gamma ray burst frying away the ozone layer to an Everest-size asteroid slamming into the ocean, we'll reveal new information about how these unparalleled events drove life to the brink of total extinction. Out of this continuous devastation, how has our planet--and life--got to where it is today? Are the worst days behind us--or lurking in the distant future?

It bursts from the Sun with the power of ten thousand nuclear weapons... and when it hits our planet, it could create the largest disaster in recorded history. A magnetic storm from the Sun could wipe out electrical power, television, radio, military communication, and nearly every piece of electronics in the Northern Hemisphere. It's a "Solar Katrina" -- a planet-wide "hurricane" of magnetic forces that scramble all 21st Century technology, possibly for good. What causes this magnetic superstorm? Why is magnetism so powerful -- and yet so poorly understood? And is there anything we can do to prevent the Magnetic Storm?

This episode focuses on the Jurassic period, a time when the first giant killers stalked the Earth and lurked in the seas; a time when the slightest advantage meant the difference between life and death. In North America the iconic allosaurus, an ambush hunter with a lethal bite, dominated. Not even the heavily-armoured stegosaurus was safe from this killer, and incredible evidence reveals a glimpse of a vicious battle between these two giants. Life in Jurassic oceans was no easier; in 2008, a fossil was dug out of a frozen island high in the Arctic. It was a colossal marine reptile, twice as big as most ocean predators, at 15 metres long and weighing about 45 tonnes. This was Predator X. Its skull alone was nearly twice the size of a tyrannosaurus rex's, and its bite force unmatched by anything in the Jurassic seas. The balance of power between predator and prey is a fine one, as prey continually evolves different ways to avoid predators. But for the most successful and enduring predators, the battle to survive has always been tipped in their favour