Adam Savage brings some of that wonder to the TED stage in this TED Ed Talk about how simple ideas lead to important scientific discoveries such as the speed of light or the circumference of the Earth. We are all explorers attempting to understand the world before us. Somethings are known, but a lot remains in question. As the Mythbusters show, some of the things we know are not.
The best part about these TED Ed talks is that it is animated. My students always liked the animated talks more than normal lectures. They can follow the images even when they don't fully understand the words being said. So if you are showing TED Talks in classes, I urge you to check out their animated videos.