TIL that the Hoover Dam contains enough concrete to build a two-lane road from San Francisco to New York.
https://dudestuffmedia.com/p/big-walls-bigger-numbers-hoover-dam-avogadro
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1favnuy/til_that_the_hoover_dam_contains_enough_concrete/