Here's a remarkable math hurdle:

In 1995, Andrew Wiles proved Fermat's Last Theorem. Until then it was listed in the Guinness Book of World Records as one of the "most difficult mathematical problems."

Mathematicians had been trying to prove it for 358 years then all of a sudden, but with some difficulty, he nailed it.

It's a very dramatic story. Weird and wonderful things happen in the stratosphere of the human mind.