Very useful Javascript feature that can prevent a user from losing the data they are entering in an entry field or text editor in case of unintentional leaving of a page.
Remember the legendary Predator movie with Arnold Schwarzenegger? Those Predator aliens had this thermal view feature so they could their prey even in complete darkness, let's Photoshop it.
Rover Curiosity, the biggest laboratory on wheels, successfully landed on the Red Planet's deepest crater called Gale and you can follow it on Twitter and Facebook as well.
Biohacker implanted what is probably the first ever computer chip implant that can monitor, record and transmit his biomertics. And he did it without the help of certified doctor.