I'm speaking with Josh Eby, who is a physicist from Israel, about dark matter. Why do we know it is there? What can it be and what can't? How we are trying to find it. 00:50 How much of dark matter is out there? 1:25 Josh’s journey to the dark matter science? 6:10 Why do we know that there is dark matter? 6:20 Not dark - invisible 7:30 Rotation of galaxies 11:30 Large scale structure of the Universe 14:50 Collision of galaxy clusters (bullet clusters) 18:40 What can’t be dark matter? 18:50 Why it is not an interstellar gas 20:00 Why not small stars or big planets 22:30 Why not neutrino 26:00 why not black holes 32:00 Maybe something is wrong with our understanding of gravity? Modified Newtonian dynamics 35:30 Hypothetical particles which can form dark matter 37:30 WIMPs 43:40 Axions 52:10 Light shining through a wall experiment 54:25 Dark matter stars 58:50 Other ways to search for dark matter 59:00 AMS - particle detector in space 61:40 Dark matter at the Large hadron collider 63:30 Dark matter is a door to the new physics 64:30 Practical implementation of dark matter Podcast powered by Spreaker. Go to www.spreaker.com/create