Gravitational Waves Explained For The Layman [Video]

In September 2015, scientists witnessed something never seen before: two black holes colliding. Both about 30 times as big as our Sun, they had been orbiting each other for millions of years. A fraction of a second before the crash, they sent a vibration across the universe at the speed of light that was picked up by the LIGO detector. So what are these ripples in space? Amber L. Stuver explains.

[TED Ed]

New Strangers Things Posters Pay Homage to Movies of the 80s [Pics]

Since the second season of Stranger Things has been announced, Netflix has released a series of posters paying homage to various movies of the 80s. Today, they’ve revealed three new posters. Can you guess the movie they refer to? I’ll also include all the previous ones below for your viewing pleasure.

Please note that the image below might take a few seconds to load.

In order: Jaws, Firestarter, Stand by Me, Alien, The Running Man, Evil Dead, A Nightmare on Elm Street.

[Via GT]