Mystery
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SCIENCE & TECHNOLOGY
Mexico’s Imperial Stone Tells a Story Of Aztec Might and Mystery
Centuries ago the Mexica capital gleamed with obsidian, a volcanic glass vital to both devotion and daily life. Fresh chemical…
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SCIENCE & TECHNOLOGY
Brazil's River Dolphins' Strange Peeing on Their Head Mystery
In the dim waters of Brazil's Amazon habitat, river dolphins amaze researchers when they turn upside down to spray urine…
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