wikiversity.org

Z8E5D TIL Crocodiles can replace about 3000 teeth in their lifetime. Their teeth are hollow inside so the new one can grow inside the old ones and quickly replace them
p8v14 TIL that when you listen to someone speak, you are hearing an uninterrupted stream of sound called continuous speech--the pauses between words are all in your head.
XE0j TIL that wikipedia operates an online university called wikiversity with over 13,000 free lessons on a wide variety of subjects.