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Why Seashells Resemble Spiraling Galaxies and the Human Heart
One halcyon spring day in 1903, the 69-year-old anatomist and naturalist Dr. James Bell Pettigrew sat at the top of a sloping ...
Early Human Ancestors Were Surprisingly Slow
Imagine the scene, around 3 million years ago in what is now east Africa. By the side of a river, an injured antelope keels ...