Ashoka Fellow Bart Weetjens' organization, APOPO, trains HeroRats (giant pouched rats) to detect land mines in Africa. Bart is also employing their superb noses to detect tuberculosis.
Bart and APOPO were just featured in CNN, and you can read the article here:
Be sure check it out and see how you can turn even the craziest ideas and interests into innovative approaches to creating widespread social change!