LEDs are already known for being a super energy efficient way to light up a room, but did you know that they might also be a way for you to connect to the internet? That’s right, a group of scientists from Germany’s Fraunhofer Institute have devised a way to encode a visible-frequency wireless signal in light from our plain old desklamps and other light fixtures. Just think – in the near future, jumping on the interwebs might be as simple as flipping on your lightswitch!

While the regular radio-frequency wi-fi most of us use currently is perfectly fine, it does have its flaws.

The concept of space-based solar power was introduced way back in 1968, but it’s only recently that the world has latched on to the idea. Japan is definitely getting in on the action with its latest spacey plan - a $21 billion solar-powered generator in the heavens to produce one gigawatt of energy, or enough to power 294,000 homes.