The best websites for self-education are Coursera, Khan Academy, and TED Talks.
Hope this isn’t too off-topic 
 
Just a few days ago I found a site called 
sports achievement tracker.
It’s packed with mind-blowing achievements.
Usain Bolt’s 9.58 seconds?
Phelps’ 28 Olympic medals?
Bubka’s 35 world records?
It’s all there.
Anyone else into stuff like this?