Nature
A Bolt of Lightning Is 5× Hotter Than the Sun
The surface of the Sun is about 5,500 °C. A lightning bolt reaches approximately 27,760 °C — five times hotter.
Science
Honey Never Spoils
Archaeologists found 3,000-year-old honey in Egyptian tombs that was still edible. Honey's low moisture and acidic pH make it inhospitable to bacteria.
Science
Octopuses Have Three Hearts
An octopus has three hearts: two pump blood to the gills, while the third pumps it to the body. When swimming, the body-heart stops — which is why octopuses prefer crawling.
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