In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
People without light stimulation from the sun (i.e. in a cave) tend to have a 25 hour sleep-wake cycle.
The Pillars of Creation, a nebula 7,000 light years away, was destroyed by supernova 6,000 years ago. In a thousand years we will see it destroyed as it takes 7,000 years for the light to reach Earth.
According to English law, the “Right to light” states that the owner of a building with windows that have received natural daylight for 20 years or more is entitled to forbid any construction or other obstruction that would deprive him or her of that illumination.
If you collapse an underwater bubble with a soundwave, light is produced, and nobody knows why.
There is a town in the Alps that does not get any direct sunlight for 84 days. However the town fixed that by installing a giant mirror on the side of the mountain.
Light can echo in space.
You can measure the speed of light using a bunch of marshmallows and a microwave.