Hey, everyone. This is Katie Mac, your friendly neighborhood cosmologist and connoisseur of cosmic catastrophes.

It's been a while since I've talked to you on all of these and a lot of things have been happening since that time

I have published a book called The End of Everything Astrophysically Speaking

Which is all about different ways the universe might end and what those would look like and I've moved to a new place

When I recorded this I was just about to start a job at North Carolina State University where I was an assistant professor of physics and

About a year ago I moved to the perimeter institute for theoretical physics in Ontario, Canada and

There I have a really cool job title, which is the Hawking Chair in cosmology and science communication and at the perimeter institute

I continue my research on dark matter and I work on a number of other early universe

Kinds of questions and I do a bunch of public engagement outreach things like that

I give a lot of talks. I do radio things and I'm working on a new book, which will come out in a couple of years

That's about particle physics

So this episode is an episode from

2017 the end of 2017 and a lot has happened in physics since then in terms of what I talked about on the episode

There's a bit of an update for the LIGO experiment at the time there were just a handful of detections of black holes colliding and other galaxies

Which is just amazing, but now there have been something like 90 detections of black holes colliding in other galaxies

There'll be some discussion in the episode about gravitational waves that we see from those another thing that we talked about is

Supermassive black holes and what they would look like if you could see them and in the movie interstellar

There was a simulation of what that would look like since then astronomers. I've actually seen that they've actually seen the light from

Stuff falling into black holes and the black hole shadow that's produced when the light gets eaten by the black holes

So there's an experiment called the event horizon telescope project

Where astronomers basically linked together

Telescopes all over the world and created an image of a couple of supermassive black holes

...