Fossilized footprints, preserved in gypsum mud that hardened over time, are estimated to be 23,000-21,000 years old. NPS / Alamy Ancient human footprints, preserved in a dry lakebed at White Sands ...
President Trump has set his sights on defunding colleges, singling out some of the world’s wealthiest schools in what critics say is an attack on academic freedom. Some are negotiating. Others are ...
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