The sun

Simon Mackie

The sun is a burning ball of gas at the centre of the solar system. It’s bigger than a million earths and has enough fuel to shine for five billion years.

Find out more about the sun

Tim Smit

Rhodri Marsden

Tim Smit is founder of Cornwall's Eden project, but in a previous life, was a songwriter and producer. Music's loss was conservation's gain.

Read more about Tim

Al Gore

Mark Reynolds

Al Gore is quite possibly the most prominent climate-change advocate on the planet.

Read more about his campaigning

ARKive

ARKive has created an indelible database of endangered plants and animals that will live on for posterity - whatever the fate of the species themselves.

Find out more about ARKive

Birute Galdikas

Birute Galdikas probably knows orang-utans better than anyone else on the planet.

Find out more about her work

Charles Darwin

Mark Reynolds

Charles Darwin's historic journey took him to the Galapagos, after which he became known as the father of evolutionary biology.

Read more about Charles Darwin

Sir David Attenborough

Sir David Attenborough is one of the world's best-known and loved nature experts.

Read more about his achievements

Edward O Wilson

Mark Reynolds

Best known for having developed and popularised the fields of sociobiology and biodiversity, Edward O Wilson is also deeply involved in the global conservation movement.

Learn more about his work

George Schaller

Martha Roberts

George Schaller has worked tirelessly to ensure the survival of some of the world's rarest species.

Read more about his career

Gerald Durrell

Martha Roberts

One of Britain's best-loved authors and naturalists, Gerald Durrell's childhood love of wildlife continued throughout his life.

Read more about Gerald Durrell