A scientific breakthrough by researchers in the US has left open the possibility that the meat on our dinner plates in the future could originate in vats of nutrients, rather than on farmyard animals. The scientists at Touro College, New York were commissioned by NASA to grow just the edible muscle for which animals are slaughtered. They cut slices of muscle between 5cm and 10cm long from goldfish, and washed them in alcohol before immersing the flesh in a nutrient-rich liquid extracted from the blood of unborn calves (this foetal bovine serum is commonly used as a medium for growing cell cultures).