Ingenious Teen's Home-Built Backhoe Toy Works Just Like the Real Thing

This video has been around for a few months, but I just came across it and it's astounding. Check out this Brazilian teen's scratch-built model backhoe. Using plastic syringes and silicon tubing, he's created a miniature hydraulic system that functions the same exact way as the mechanism inside a real excavator. This… »4/12/14 6:00pm4/12/14 6:00pm

Color-Changing Ink Ensures These Syringes Are Never Re-Used

Vaccines can be a vital way to stop the spread of disease in some parts of the world. But in underdeveloped countries, it turns out that the syringes used for vaccine injections are re-used again and again, which actually results in the spread of other dangerous conditions. To discourage this, Dr. David Swann of… »9/04/13 9:49am9/04/13 9:49am