The Asteroid versus the Volcanoes

Volcanoes on ancient Earth and not-so-ancient Venus are the main topics for the astroquarks, with planetary trivia, and a giant gassy wave moving through the Milky Way. Catch up on all the different types of numbers, from imaginary to prime, and all the space news  and climate updates on this episode of Walkabout the Galaxy. Check out YouTube for the gas-wave shimmy.