People power is perhaps one of the world's greatest untapped sources of renewable energy. Smart devices that harness kinetic energy from everyday human activities help the environment in more ways ...

A swinging pirate ship ride at a theme park. Kinetic energy is transferred into gravitational potential energy. Doing 'work' is the scientific way of saying that energy has been transferred. For ...

April 10, 2009 The United States has about 250 million registered vehicles, which adds up to a lot of pollution and burning of fossil fuels. New Energy Technologies, Inc. prefers to look at it another ...

Their assignment: to create a rollercoaster out of paper! The project set the wheels of these kids’ minds in motion. Bringing ...

Kinetic paving technology is a new way to draw power from people’s footsteps and it’s making a big impact in the renewable energy sector. Installing the system in your home can effectively turn your ...

Source: NOVA: "Secrets of Lost Empires II: Medieval Siege" This media asset was adapted from NOVA: "Secrets of Lost Empires II: Medieval Siege" In medieval times, one of the most fearsome weapons was ...