A bizarre 400-million-year-old fossil may not be a plant, animal, or even a fungus. Known asPrototaxites, this extinct ...
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How Old Is the Earth?
Stromatolites: You Can't Spell Mold Without Old One of the big problems with Kelvin's estimates for the age of the Earth was ...
The intricate cave system perched deep in an isolated stretch of Spanish mountains contained the remains of an ancient and ...