View full lesson: http://ed.ted.com/lessons/how-antibiotics-become-resistant-over-time-kevin-wu

Right now, you are inhabited by trillions of microorganisms. Many of these bacteria are harmless (or even helpful!), but there are a few strains of ‘super bacteria’ that are pretty nasty -- and they’re growing resistant to our antibiotics. Why is this happening? Kevin Wu details the evolution of this problem that presents a big challenge for the future of medicine.

Lesson by Kevin Wu, animation by Brett Underhill.