A video explaining how the universe is measured. Made by the Royal Observatory Greenwich.
How to assemble a lightsaber.
By Yum Yum London.
Beautiful color photography of Mongolia in 1913.
An optical illusion.
A blue glow due to Cherenkov radiation.
Velcro in a way you have never seen before.
A great spectacle in the sky.
Sailing around the earth on solar energy.
Staying over in space in 2016.
Or: quantum levitation.