These spirals date back to at least World War II, and the reason they're still in use has everything to do with safety.
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What is a solar eclipse?

A solar eclipse occurs when the moon positions itself between Earth and the sun, casting a shadow over Earth. We explore the ...
Discover how Raman spectroscopy combined with rheology provides deep insights into the melting and recrystallization behavior ...
Astronomers studying a rare Einstein Cross stumbled upon an impossible “fifth image” that shouldn’t exist — and it revealed ...
On Sept. 26, 2022, NASA's Double Asteroid Redirection Test craft smashed into its target, the hazardous asteroid Dimorphos, and raised hopes that a space rock could be deflected from a collision ...