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The moon reaches its half-lit final quarter phase this week: Here's what to expect
The moon's last quarter - or final quarter phase will occur at 07:59 a.m. EDT (1159 GMT) on the morning of May 20 for viewers ...
Scientists Probed a Medieval Alchemist’s Artifacts—and Found an Element That Changes ...
These days, we would call them proprietary blends. But in the late 1500s and early 1600s, individual alchemists called the ...