The objects are as small as a tepary bean and as big as San Xavier del Bac. Some are quite old, like the spear points left behind some 13,000 years ago by the Paleo-Indians called Clovis. Some are as ...
Plenty of our childhoods had at least one math teacher who made the (ultimately erroneous) claim that we needed to learn to do math because we wouldn’t always have a calculator in our ...
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