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Oldest weapons ever discovered in North America pre-date Clovis

Texas A&M University researchers have discovered what are believed to be the oldest weapons ever found in North America: ancient spear points that are 15,500 years old. The findings raise new questions about the settlement of early peoples on the continent. Michael Waters, distinguished professor of anthropology and director of ...

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Origin of Earth’s oldest crystals

New research suggests that the very oldest pieces of rock on Earth — zircon crystals — are likely to have formed in the craters left by violent asteroid impacts that peppered our nascent planet, rather than via plate tectonics as was previously believed. Rocks that formed over the course of ...

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