CASTalks - What's the Matter with Dark Matter?

We welcome back Dr. Luke Leisman for an exciting talk on Dark Matter.

We think it makes up 85% of the mass of the universe, but we can't see it, we don't know what it is, and we aren't even sure if it exists. In this talk, Dr. Leisman will explore the story of dark matter, including nearly 100 years of evidence for its existence, as well as the conflicts and competing hypotheses trying to explain what it is. He will also face the problems with these hypotheses, and the conundrums facing astronomers as they continue to search for answers to one of the universe's most elusive mysteries.