While the average person is happier with a large friend circle, new research reveals those with higher IQs are better off with a small one.

A huge milestone has just been reached in the field of artificial intelligence: AlphaGo, the program developed by Google's DeepMind unit, has defeated legendary Go player Lee Se-dol in the first of five historic matches being held in Seoul, South Korea. Lee resigned after about three and a half hours, with 28 minutes and 28 seconds remaining on his clock. The series is the first time a professional 9-dan Go player has taken on a computer, and Lee is competing for a $1 million prize.

Artificial intelligence is breathing down our necks: Software built by Google startled the field last week by easily defeating the world’s best player of the Asian board game Go in a five-game match. Go resembles chess in the deep, complex problems it poses but is even harder to play and has resisted AI researchers longer. It requires mastery of strategy and tactics while you conceal your own plans and try to read your opponent’s.

For years, the Pentagon has pursued the dream of directed energy weaponry — laser weapons that could defeat a foe for pennies when compared with the expensive kinetic weapons the department relies on. And for years, the technology proved to be elusive. But the time has finally come where those weapons are capable of being fielded, according to a trio of Lockheed Martin executives who work on the development of the company’s laser arsenal.