The task is simple: walk or die.

"Despite the ongoing cultural controversy in America, evolution remains a cornerstone of science. In this book, Francisco J. Ayala---an evolutionary biologist, member of the National Academy of ...

Pt. 1: Origins. Balancing act ; What lies beneath ; I'd rather take a beating than back down ; Darwin's nemesis ; Class acts -- Pt. 2: Survival of the fittest. Broken watches ; The watchmaker returns ...