Extraterrestrials

Extraterrestrials book cover
CONTENTS Chapter 1 ARE WE ALONE 4 Chapter 2 THE BEGINNING OF LIFE ON EARTH 10 Chapter 3 LIFE ON VENUS AND MARS 16 Chapter 4 FINDING EXTRATERRESTRIALS 22 Chapter 5 EXTRATERRESTRIALS IN THE SOLAR SYSTEM 28 Chapter 6 BEYOND THE SOLAR SYSTEM 34 Be a Space Scientist ANSWERS 44 Glossary and Further Reading 46 Index 48