Billionaire Peter Thiel invests in the development of 3D printed meat

The prospect of lab-grown meat has intrigued both vegetarians and environmentalists for years. Humans eat about 240 billion kilograms of meat each year — a voracious demand for animal protein that has resulted in environmental degradation, cruelty to livestock, and the spread of dangerous diseases. And now, owing to… » 8/20/12 1:20pm 8/20/12 1:20pm