The Skeptics Guide #510 - Apr 18 2015

Special Guest: Bill Nye; Forgotten Superheroes of Science: Lise Meitner and Ida Tacke; News Items: Parents No Longer Anti-Vaccine, Noticing Spiders, Solar Sail, NASA-ET Life in 20 Years, Lava Tubes on the Moon; Special Report: Bill Nye on GMOs; Science or Fiction