Gemma Elwin Harris is a freelance writer and editor who has contributed to Time Out, Glamour, and the Sunday Times.

A graduate of Cambridge University, she lives in Edinburgh, Scotland. Her young son and two very curious nieces inspired this book.

Miranda Hart made her mark appearing in shows including Smack the Pony, Absolutely Fabulous and Not Going Out. But when her sitcom Miranda burst on to our screens in 2009, her popularity rocketed.

Miranda has since been crowned the Queen of Comedy at the British Comedy Awards and won Best new TV comedy, as well as winning best actress in 2010 and 2011.

She has also won three RTS comedy awards and has been nominated for four BAFTAs.

Her book Is It Just Me? was the number one best-selling memoir of 2012 and to date it has sold over 580,000 copies. Her stand up show My, What I Call, Live Show was a sell-out in 2013.

Brian Cox is a Professor of Particle Physics and Royal Society University Research Fellow at the University of Manchester.

He also works at the CERN laboratory in Geneva. He has received many awards for his work promoting science, including the prestigious British Association Lord Kelvin Award and, in 2010, an OBE.

He is also a popular presenter on TV and radio. Brian Cox and Jeff Forshaw began collaborating on scientific papers in 1998 and have published on topics ranging from Pomerons to Higgs Bosons.

Their first book together Why Does E = mc2? became a critically acclaimed international bestseller.

Bear Grylls has become known around the world as one of the most recognised faces of survival and outdoor adventure. His journey to this acclaim started in the UK, where his late father taught him to climb and sail.

Trained from a young age in martial arts, Bear went on to spend three years as a soldier in the British Special Forces, serving with 21 SAS. It was here that he perfected many of the skills that his fans all over the world enjoy, watching him pit himself against Mother Nature.

His TV show, MAN VS WILD/BORN SURVIVOR, became one of the most watched programmes on the planet with an estimated audience of 1.2 billion. He also hosts the hit adventure show RUNNING WILD on NBC in America, as well as THE ISLAND WITH BEAR GRYLLS for Channel 4 and MISSION SURVIVE WITH BEAR GRYLLS for ITV in the UK.

He is currently the youngest ever Chief Scout to the UK Scout Association and is an honorary Colonel to the Royal Marines Commandos.

He has authored a number of fiction and non-fiction books, including the Sunday Times top ten bestseller, GHOST FLIGHT, and the number one bestseller, MUD, SWEAT & TEARS.

Sir David Attenborough is a broadcaster and naturalist whose television career is now in its seventh decade. After studying Natural Sciences at Cambridge and a brief stint in publishing, he joined the BBC in 1952 and spent ten years making documentary programmes of all kinds, including the Zoo Quest series. In 1965, he was appointed Controller of a new network, BBC2, and then, after four years became editorially responsible for both BBC1 and BBC2.

After eight years of administration, he returned to programme-making to write and present a thirteen-part series, Life on Earth, which surveyed the evolutionary history of animals and plants. This was followed by many other series which, between them, surveyed almost every aspect of life on earth.