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Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
A boy walks past a member of the unofficial “community police” in Cruz Grande, Guerrero, Mexico.
People whose behaviors violate norms are often called mentally ill. “Why else would they do such ...
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
Early geologists discovered evidence of past glaciations in U-shaped valleys