First Contact

CONTENTS

1 THE BIGGEST DISCOVERY OF THEM ALL

2 REALLY EXTREME LIFE

3 WHAT MAKES SOMETHING ALIVE?

4 THE SPARK OF LIFE

5 ON THE TRAIL OF LIFE ON MARS

6 THREE EUREKAS ON HOLD

7 PLANET-HUNTING

8 LIFE AND THE LAWS OF PHYSICS

9 FAR-FLUNG INTELLIGENT WORLDS

10 THE DAY AFTER FIRST CONTACT

ACKNOWLEDGMENTS

NOTE ON SOURCES