Opioids mimic the body's natural pain relievers, binding to receptor proteins in the brain and sometimes inducing euphoria. National Corporate funding for NOVA is provided by Carlisle Companies.

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

"NOVA," PBS' award-winning documentary science series, has been doing "MythBusters ... (and recorded in high-speed, high-definition video) on the latest episode of "NOVA." Yes, that means musket ...