Back in December I gave a public lecture in the Saturday Morning Physics series organized by the Physics Department at the University of Michigan. All SMP lectures are recorded and put on YouTube afterwards. Here’s mine, called Splash Gordon: The Origin of Water on Earth:
Just this last weekend, I joined the Ann Arbor Science & Skeptics group for one of their monthly meetings to talk about chemistry in space and the origin of life on Earth. An audio recording of the full event is available as a podcast.