Random Facts #49 · 3:23pm Mar 27th, 2017
Chalkboards were mostly replaced with whiteboards to reduce dust.
The kilogram was once defined using a solid metal cylinder. Now it's defined using a precise number of atoms.
Its technically legal to now broadcast your own analog TV station, as since most channels now are digital, many regulations on analogue channels such as who can run them have been lifted. Just watch out for big channels that still keep their analogue channel running. It's illegal if your channel interferes with existing ones.
Silly putty resulted from a study to make sturdier rubber for tires.
Play-doh used to be wallpaper cleaner.
Rome still uses lead pipes in many areas. Like as in, those lead pipes have been around since ancient times.
Awesom facts.
I thought it was to reduce that horrid noise.
4473987 Yes, that too.
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I have very sensitive ears.