Underwater Tunnels: HOW?

How they get that tunnel under there. Plus, a centuries-old scientific debate: why ice is slippery. Guests: Dr. Gary Brierley (aka Dr. Mole), tunnel engineer, Dr. Miquel Salmeron, physicist at Lawrence Berkeley National Laboratory, Special thanks to callers Nikki and Erin. Check out the Terrifying Tunnel Video referenced in today's show. Learn more about your ad choices. Visit megaphone.fm/adchoices