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The Loma Fire burning in the Santa Cruz Mountains has scorched 2,250 acres since it broke out Monday afternoon. So far, the fire is 10 percent contained. More
Atmospheric oxygen levels have declined over the past 1 million years, although not nearly enough to trigger any major problems for life on Earth, a new study finds.
Good news on the alien-life-hunting front: The towering plumes emanating from Jupiter's ocean-harboring moon Europa appear to be real.