wonderopolis.org

KO0Va TIL researchers concluded that animals can have very complex dreams that include memories or replays of events that happened while they were awake.
OoaPR TIL the word Hello became popular after Thomas Edison suggested its use when answering the phone. Alexander Graham Bell, his competitor, preferred Ahoy.
rRWa1 TIL that donuts have holes in them to evenly cook the dough.