2 ideas from Scientific American, each explained in a minute and credited to the original work. Free on Savvy.
Sand grains are roughly half a millimetre across, and beaches wrap around every continent on the planet. Scientists have tried to turn that into an actual number by estimating aver…
— Scientific American, Do Stars Outnumber the Sands of Earth's Beaches?
The seven-year figure is one of the most repeated playground warnings about swallowing gum. Doctors who've gone looking for old wads with endoscopy and imaging keep coming back wit…
— Scientific American, Fact or Fiction?: Chewing Gum Takes Seven Years to Digest