Table of Contents

02 August 2013
Vol 341, Issue 6145

About The Cover

Cover image expansion

COVER Clouds pass over Kenya's Lake Magadi, where geologists are drilling a core to gather detailed climate data from the ancient lake bed. Data on past climates are vital for researchers seeking to understand how anthropogenic climate change will affect Earth?s ecosystems and species, including its effects on infectious diseases and food security. See the special section beginning on page 472. Photo: © Martin Harvey/Alamy