About 10 percent of humans are left-handed, and this has been consistent across cultures and throughout recorded history. From an evolutionary standpoint, this is a puzzle. The explanation involves fighting, and it is stranger than it sounds.
When the Black Death killed roughly a third of Europe's population between 1347 and 1353, it did something economists would predict but nobody planned: it made labor scarce, and scarce labor gets paid more.
In south-central Utah, a forest of about 47,000 quaking aspen trees is actually one organism, connected by a single root system. It weighs roughly 6,000,000 kilograms. And it is dying.
Humans spend roughly six years of their lives dreaming. We have studied dreams for over a century, scanned the brains of sleepers, and run thousands of experiments. We still do not know what dreams are for.
In 1963, a Tanzanian schoolboy named Erasto Mpemba noticed that hot ice cream mixture froze faster than cold. His physics teacher told him he was wrong. He wasn't. It took until 2016 for researchers to agree on why.
GPS satellites use Einstein's theories of relativity to keep your location accurate. Without corrections for both special and general relativity, the system would accumulate errors of about 10 kilometers every day.
A daily curiosity publication. One story per day, on any topic: science, history, geography, economics, materials, language, space, biology, physics. The only rule is that it has to be genuinely interesting and precisely true.
Microlurn stories are written to be accurate, surprising, and shareable. Every claim is researched and verified. When a number is uncertain, the language hedges rather than guesses. Corrections are published immediately when mistakes are found.
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