How food scientists are reinventing meat – and how it can benefit everyone.

Meat consumption worldwide has doubled in the last 20 years, and it is expected to double again by 2050. This is happening in large part because economies are growing and people can afford more meat. That's all good news. But raising meat takes a great deal of land and water and has a substantial environmental impact. Put simply, there's no way to produce enough meat for 9 billion people. Yet we can't ask everyone to become vegetarians. We need ...