She says: "I believe that the day is not far off when we will be able to prescribe drugs that cause severed spinal cords to heal, hearts to regenerate and lost limbs to regrow."

So this time, Chen's team injected the spinal cords of mice with a neurotoxin that seeks out the GRPR receptor, sort of a docking site.

The entire carcass of cattle not inspected and passed for human consumption is also prohibited, unless the cattle are less than 30 months of age, or the brains and spinal cords have been removed.