I have a lot of time for Loeb. He has a joy in conjecture and an omnivorous spirit of inquiry that are more reminiscent of 20th-century thinkers such as Freeman Dyson or Carl Sagan than most of his peers. His readiness to stake his reputation on such an unconventional hypothesis is a mark of uncommon bravery . . . [Carl] Sagan would have liked this book Oliver Moody The Times