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Understanding the similarities and differences of the deserts on Earth and Mars will help space travelers survive future ...
Located near California State Route 74, the Hemet Maze Stone is a geometric rock engraving of uncertain origin, estimated to be over 500 years old. Unlike regional Native American petroglyphs, its ...
The Concord Fault, which runs through Bay Area neighborhoods in Concord and Walnut Creek is in a different location than previously understood. It could produce a major earthquake in the Bay Area.