Instead of inviting players to explore faraway fantasy lands or fight in imagined battlefields, the world of The Sims hews closer to reality. Through avatars called "Sims," players build homes, have careers, form relationships and try on gender identities -- all while meeting their basic needs, like sleep and hunger. Over 24 years, the game has evolved to include four main editions and dozens of expansion packs. Its latest edition has 88 million users, according to developer Maxis. There are even plans for a movie based on the cozy-quirky game.

A photo shows the logo of Renren.com. Will robots take over our world? These questions, which once seemed irrelevant, now frequently come into our minds with the advancement of Artificial Intelligence (AI). A recent report shows that there are almost no active users left on Renren, as advertising accounts keep pushing uninteresting contents and the system keeps recommending other people's posts that were so "yesterday". Some have jokingly said this must be what will happen to our world after it is taken by AI.