New clues reveal the devastation the day the dinosaurs died - National Geographic

Unusual traces found in Texas show what happened when the Chicxulub asteroid vaporized a thick bed of rock, unleashing superheated gas that kicked off a calamitous period of climate changes.

Tiny flecks of white dot a section of crumbly rocks along Texas's Brazos River. To a casual observer, the grains may seem like unremarkable bits of sand, but within their oddball shapes lie clues to … [+8057 chars]

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