Christopher Lloyd

Author Christopher Lloyd has developed an online game to help promote his new book What on Earth Evolved? 100 Species that Changed the World (Bloomsbury, October).

The five-minute game, said to be loosely based on the board game "Snakes and Ladders", tests your knowledge of the natural world.

Lloyd is set to donate £1 from the future proceeds of the book to environmental charities for each player, to a maximum of £5,000. The game can be played at