Expert meteoriticist and friend of Cosmic Coffee Time Greg Brennecka returns to talk about an exciting development in the meteorite impact scene, the Nadir crater. This newly discovered undersea structure off the coast of Guinea in western Africa is a proposed meteorite impact site. How was this discovered? when did the impact happen and how do we know if the impactor hit land or sea.It's a fascinating chat.Find Greg's book 'Impact' at Harper Collins here Follow Cosmic Coffee Time on Twitter for some special contenttwitter.com/CosmicCoffTimeYou can request a topic for the show! Or even just say hi!We'd love to hear from you.Email us!cosmiccoffeetime@gmail.com