The Download: China's marine ranches, and fast-learning robots

A short ferry ride from the port city of Yantai, on the northeast coast of China, sits Genghai No. 1, a 12,000-metric-ton ring of oil-rig-style steel platforms, advertised as a hotel and entertainment complex. Genghai is in fact an unusual tourist destination, one that breeds 200,000 "high-quality marine fish" each year. The vast majority are released into the ocean as part of a process known as marine ranching. The Chinese government sees this work as an urgent and necessary response to the bleak reality that fisheries are collapsing both in China and worldwide. But just how much of a difference can it make? This story is from the latest print edition of MIT Technology Review--it's all about the exciting breakthroughs happening in the world right now.