They are some of the best ideas in the world — and the inventors have yet to graduate from high school.

Google announced the winners of the 2012 Google Science Fair Tuesday morning, highlighting the work of 21 students, some as young as 13, and the innovative projects they developed — from cancer research to vertical farming to 3D electronics to dementia research.

Grand prize winner Brittany Wenger, a 17-year-old high school junior from Lakewood Ranch, Fla., built a cloud-based tool to help doctors accurately diagnose breast cancer. The software compares individual test results to an extensive dataset stored online, allowing doctors to assess tumors using a minimally-invasive procedure.

“My enthusiasm for science continues to blossom,” Wenger said in a recent interview. “I expect to major in computer science when I attend college and continue to medical school.”

READ MORE: Click below