Guiding us through major concepts in quantum mechanics, cosmology, string theory and more, Katie Mack describes how small tweaks to our incomplete understanding of reality, can result in vastly different endings for our universe. Katie's book "The End of Everything" is available now: https://geni.us/tPqg Watch the Q&A: https://youtu.be/FEfhUsZBrGk Subscribe for regular science videos: http://bit.ly/RiSubscRibe Katie Mack is a theoretical astrophysicist and one of the most popular scientists on