GABRIELLE WALKER is a features editor for New Scientist and has also written for The Economist and a host of other publications. She lives in London.

'An engrossing book on the emergence of a stunning new account of events on our primordial planet ... fascinating' Sunday Telegraph 'Riveting in its vivid portrayal of the great icy catastrophes which may have gripped our planet ... both the geological and the human story are brilliantly told' Oliver Sacks 'This is a story worth telling ... Walker is an ideal person to tell it ... Racy and pacey, with a focus on the people involved ... A very entertaining read' Independent 'She takes a cold topic, and creates a warm, readable story' Ireland on Sunday

GABRIELLE WALKER is a features editor for New Scientist and has also written for The Economist and a host of other publications. She lives in London.

'An engrossing book on the emergence of a stunning new account of events on our primordial planet ... fascinating' Sunday Telegraph 'Riveting in its vivid portrayal of the great icy catastrophes which may have gripped our planet ... both the geological and the human story are brilliantly told' Oliver Sacks 'This is a story worth telling ... Walker is an ideal person to tell it ... Racy and pacey, with a focus on the people involved ... A very entertaining read' Independent 'She takes a cold topic, and creates a warm, readable story' Ireland on Sunday

GABRIELLE WALKER is a features editor for New Scientist and has also written for The Economist and a host of other publications. She lives in London.

'An engrossing book on the emergence of a stunning new account of events on our primordial planet ... fascinating' Sunday Telegraph 'Riveting in its vivid portrayal of the great icy catastrophes which may have gripped our planet ... both the geological and the human story are brilliantly told' Oliver Sacks 'This is a story worth telling ... Walker is an ideal person to tell it ... Racy and pacey, with a focus on the people involved ... A very entertaining read' Independent 'She takes a cold topic, and creates a warm, readable story' Ireland on Sunday