› added 4 years ago

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TIL humid air is lighter than dry air. This is why low-pressure areas (L) bring the rain, not the high-pressure areas (H). And this is because water (H2O) molecules are actually lighter than Oxygen (O2) and Nitrogen (N2) that make up the atmosphere.

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R7oBj TIL For 20 years, J.R.R. Tolkien sent his children illustrated letters from Santa Claus where Santa would battle goblins flying on bats, and included fireworks, a prank-loving polar bear, and multiple invented languages.
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