302K views · 117 shares | Now you can play Brain Test in Facebook Instant games! Enjoy :) Play Now: https://fb.gg/play/braintestpuzzles | Unico Studio | Facebook

2.6M views · 24K reactions | This video puts the incredible speed of light to the test! It compares how many times light could travel around the entire surface of each planet in just one second. Prepare to be surprised by the vast difference between a light beam racing around tiny Mercury and one zipping around the giant gas planet Jupiter! | The Brain Maze | Facebook