Google's DeepMind artificial intelligence algorithm has learned hundreds of years of chess knowledge and then surpassed it in just four hours. That's right, AlphaZero quickly mastered the classic game, before devising completely new strategies, which are now being analyzed by grandmasters. In comparison, IBM's Deep Blue supercomputer, the one that beat Gary Kasparov in 1997, was already programmed with the best moves. Click here for the first image in today's viral picture gallery. Continue reading for the five most popular viral videos today, including one of nine fascinating space travel facts.