The award-winning works of Google science Expo show the infinite potential of teenagers in invention and creation, which is exciting.

How many times have you tried to turn on the flashlight only to find that the battery has run out? Well, now, it's easy to do it by relying on the heat in your hand. The things you need are simple - you have to be alive and warm.

The hollow flashlight was invented by 15-year-old Ann makosinski from Victoria, Canada. Her flashlight was well received at the annual Google science Expo and is one of four award-winning works.

Google science Expo highlights the innovation of teenagers around the world and has received more than 1000 inventions. The $50000 scholarship was won by Eric Chen of San Diego, who invented a new flu drug using computer models.

Mr. Chen is only 17 years old and is already trying to save the world. Using a supercomputer and biological experiments, he tried to find a way to invent influenza inhibitors before a future influenza pandemic.

Australia's 14-year-old vuney Kumar won in the 13-14 age group. She has developed an android app that can notify drivers nearly 70 seconds in advance before ambulances or other emergency vehicles enter the site.

The name of this application invention is part. It uses GPS data to give drivers enough time to get out of the road and reduce the possibility of recipients falling into traffic jams.

Elif bilgin, 16, from Turkey, won the grand prize for successfully extracting bioplastics from banana peel. The purpose of the invention is to reduce the use of plastics extracted from petroleum.

Award winning work of Google science Expo: flashlight without battery

At the same time, makosinsky wanted to use Peltier electric heating plates to make flashlights, which produce electricity when the temperatures on both sides are different.

Therefore, she designed the flashlight as a hollow structure. One side uses the palm temperature to heat, the other side uses the hollow design to cool the air naturally, and then through the voltage amplification circuit, the generated current can drive three LED bulbs.

If the flashlight is cheap enough, it can help people in developing countries who can't use electricity or light at night. (smiley)