sciencenotes.org

0dPkM TIL Uranium and Plutonium are named after Uranus and Pluto
4krk6 [TIL] If you stretched an ATOM to the size of a football field, the NUCLEUS would be the size of a pea. The nucleus is extremely tiny yet very dense. It accounts for less than one ten-trillionth of the volume of an atom but about 99.9994% of an atom’s mass.
W7LnY TIL that average cumulus cloud weighs about 1.1 million pounds or 500,000 kilograms. That's about the same as 40 school buses.