TEDTalks: The Beautiful Mathematics of Coral (and Crochet)

I held off until the weekend to watch this, so this comment comes late.

I am neither a mathematician nor a woman, but when she held up a piece of crochet to physically demonstrate that there are an infinite number of non-intersecting straight lines in hyperbolic space, I physically clapped my hands. Sitting alone in front of my computer, a fully modern human, I reverted to base hominid behavior and banged the palms of my front paws together in a fundamental expression of solidarity and joy.

Thank you for bringing this to my attention.