What do black holes do as they merge? What is "ringdown"?

Welcome to Alas Lewis & Barnes, a "conversation" about the universe between two cosmologists. Always sciency, sometimes funny, never boring.

Our latest book is "The Cosmic Revolutionary's Handbook": https://www.amazon.com/CosmicRevolut...

Our previous book "A Fortunate Universe" is now available in paperback: https://www.amazon.com/FortunateUniv...

Podcast: http://itunes.apple.com/us/podcast/al...
Twitter:   / alaslewisbarnes  
Facebook:   / afortunateuniverse  

Music: https://www.bensound.com