From NOVA PBS, Solar Power: 

The amount of solar energy that strike the surface of the Earth in one hour is more than enough to supply every person on the planet with electricity for an entire year. However, there are limits that prevent us from being able to fully take advantage of this energy.

For now, at least!

Watch more videos about the sun in the archives.

From NOVA PBS, an explanation of how wind turbines work, what challenges wind power faces, and why this renewable energy source is important. With charts!

More vids with wind turbines are in the archives. 

From Nova PBS, “What is energy and why are we on a never ending search for new energy sources?”

If you could mix your bicycle with your car, you might get something like the Firefly by Geospace Studio. With a protective shell that illuminates with LEDs for knight night riding, could the Firefly become a fun, environmentally-friendly alternative to a car, and a warmer, more visible, all-weather option to a bike?

File under: inventions and things that glow.

h/t TheCoolist.

According to the research, “a wet animal could spend 20% or more of it’s daily food energy to evaporate water in its fur, if it cannot shake.” Therefore, it’s super important to get dry! Earth Unplugged’s Sam and Simon slow down this phenomenon of mammals shaking to get dry — super slow-mo style — in this sixth episode by BBC Earth Productions.

via Laughing Squid.