Chip Walter

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Last Ape Standing: The Seven-Million-Year Story of How and Why We Survived

by Chip Walter

Over the past 150 years scientists have discovered evidence that at least twenty-seven species of humans evolved on planet Earth. These weren't simply variations on apes, but upright-walking humans who lived...

Thumbs, Toes, and Tears: And Other Traits That Make Us Human

by Chip Walter

The fascinating evolutionary links between six seemingly unremarkable traits that make us the very remarkable creatures we are.