Dara O Briain and the team go on a journey through time to discover what it is and how to get more of it.

In the second episode of this six-part science series, Dara O Briain and his team of experts take us on a mind-altering journey around theoretical physics, with a look at the father of modern physics himself, Albert Einstein. Dara finds out if you can measure the speed of light using cheese on toast, and oceanographer Helen Czerski hunts down Albert Einstein's elusive gravitational waves - which have been mystifying scientists for years. Materials scientist Mark Miodownik takes a fridge apart, guest Marcus Brigstocke attempts to get to grips with dark energy, and some of the biggest brains in science are brought to bear on the eternal problem of tangled headphone wires.

Dara O Briain and his team explore how powerful, affordable technology is ushering in a new era of DIY science that everyone can get involved in.

Dara and the team shine a light on some of the mysterious and usually hidden worlds surrounding us, from our internal ecosystems to nanotechnology and more.

This first episode in a new six-part science series presented by Dara O Briain takes a look at the weird and wonderful world of reproduction and inheritance.

A computer that can read your thoughts, a NASA theory that the Earth's weather is being influenced by a mysterious force, and how illusions and machines can be used to manipulate the mind.

The comedian and his team of experts investigate outer space, with Josh Widdicombe finding out the challenges Nasa faces to reach its goal of sending astronauts to Mars

The comedian and his team of experts take a weird and wonderful look at life, death and extinction. Comedian Mark Steel learns how to deflect an incoming asteroid, neuroscientist Tali Sharot attends the first-ever taste test of beef grown solely in the lab and materials scientist Mark Miodownik takes a shotgun apart. Journalist Alok Jha asks whether pandas should be allowed to die out, as he examines if there are other species it would make more sense to invest effort in saving, and oceanographer Helen Czerski reports on the possibility of bringing extinct species back from the dead.