This week we're exploring the future of nuclear energy, including meeting the makers of a new design of nuclear reactor that can consume the fuels that other plants can't burn. We also delve into ways to unclog pipes inside reactors without the risks of going inside. And where do you stand on the nuclear debate? Should we be exploring alternatives, or is there no alternative to a nuclear-future? We talk to two parties on opposite sides of the debate. Plus, what the Messenger probe has found on Mercury, a blood test to predict an imminent heart attack, flushing out evidence of drug use from sewer water, and a way to block baldness in men...