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For more than a century, dinosaur footprints have been both a gift and a headache. They’re some of the most direct evidence we have of animals moving through real landscapes, but they’re also notoriously hard to interpret.

A footprint is not…

For years, the Silverpit Crater sat under the North Sea as one of geology’s most awkward arguments. It had the circular shape, the uplifted center, and the faulted rings that made it look like an impact crater. But that was not enough….

The passage of time may be linear, but the course of human aging is not.

Rather than a gradual transition, your life staggers and lurches through the rapid growth of childhood and the plateau of early adulthood, to an acceleration in aging as…