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90 million miles away from us is the power that shapes our world - the sun. We see it shine in the sky above us, but beyond our sight something dramatic is happening - the sun is going into overdrive.
Why do animals perfectly adapted to island life give up the ghost when new species arrive?
5/6 • South Pacific • Environment
For centuries we have dreamt of reaching the centre of the Earth. Now scientists are uncovering a bizarre and alien world that lies 4,000 miles beneath our feet, unlike anything we know on the surface. It is a planet buried within the planet we know, where storms rage within a sea of white-hot metal and a giant forest of crystals make up a metal core the size of the Moon.
When Earth gets hit by a a massive chunk of the Sun known as a deadly Solar Storm, our planet's electrical system turns into a smoking ruin. How does modern civilization cope without power?
S1E5 • Doomsday: 10 Ways the World Will End • 2016 • Environment
A look at one of the most exclusive holiday destinations in the world - Necker Island. This reveals how the rich take a holiday, and what it's like for the staff who serve them.
Volcanoes have a fearsome reputation. In reality, they are the most important force in the creation of the planet as we know it today. Iain abseils into a lava lake and cave dives in a cenote to show how the heat that fuels volcanoes also drives some of the most fundamental processes on the planet.