17-year-old Marian Bechtel might live in Pennsylvania, where land mines are not a common occurrence, but she has still managed to invent the prototype for a brand-new minesweeper. The device, [with a] cost far lower than current technology, uses sound waves to figure out where the deadly devices are. The combination of sensitive microphones and a seismic vibrator connected to a standard metal detector was tested, successfully, on mock plastic and metal land mines. It was a finalist in the recently concluded 2012 Intel Science Talent Search. The project was inspired by family connections and a lucky flash of inspiration. My parents are both geologists," she says. "Years ago they got connected with an international group of scientists working on a project called RASCAN, developing a holographic radar device for detecting land mines. During the summer before eighth grade, I met all of these scientists and talked with them about their work and the land mine issue. I was really touched and inspired by what they had to say, and wanted to get involved in science and possibly land mine detection. I noticed that when I played certain chords or notes on the piano, the strings on a nearby banjo would resonate," says Bechtel. "I heard this, and it was almost like the story of the apple falling on Newtons head -- I thought that maybe I could use the same principle to find landmines. So, I began doing research and talking with scientists in humanitarian de-mining and acoustics; three years later I had built a prototype."