In the early days of rocket science, researchers wondered how an astronaut would communicate with Earth once they reached the moon. One scientist thought shining a bright light back to Earth was a good idea. Even though that was decades ago, that wasn't far off. Today, lasers are used for a variety of space communication, and how they work is incredible.

Plus, big-time influencers are leaving social media, and here are the reasons why. Update your Apple tech now to fix a serious security flaw. Send your travel docs to your tablet and the right amount of steps you need to take in a day.