To watch

Here's a selection of public talks I've given over the years that happened to be filmed...

ABC Catalyst
Television, 2019-2023

I've hosted several episodes of the Australian Broadcasting Corporation (ABC)'s Catalyst program. Each is an hour-long documentary on some cool aspects of astrophysics. From flying in a fighter jet to roller-derby and indoor skydiving... I have fun filming these!! The links to the episodes (free to watch in Australia) are:

Black hole hunters (2019)

Asteroid hunters (2020)

Mars: our second home (2021)

Mars: the hunt for life (2021)

The Dark Side of the Universe (2023)

1 hr each

Ukraine Physics Seminar
Online, April 2023

Professional level talk in a series supporting Ukrainian physicists. Talking about the latest in cosmology, focusing on the tensions that are arising between different measurements of the same features of the Universe (like the expansion rate, H0).

1 hr

The Dark Side of the Universe
Groningen, Netherlands, July 2022

Summary of the primary evidence for dark energy and dark matter.

This is a public talk I delivered at the Information Universe conference in the Netherlands. This is a really interesting conference in which we try to get to the nuts and bolts of what might be making the universe tick.

54 mins

Waterloo Astrophysics Seminar
Online, September 2021

Professional level talk discussing misconceptions about the big bang. Somewhat mathematical, but also conceptual.

1 hr

International Day of Women in Science clip
Brisbane, February 2019

Little clip of me talking about why I love doing science.

1 min

Brisbane, October 2013

My overview of modern cosmology in under 20 minutes.

This was my first TEDx experience and I loved it. There were many really interesting talks during the day, and in the breaks I was able to chat to all sorts of interesting and interested people.

18 mins

Noosa, April 2014

This was my second TEDx experience and I threw in a few more personal anecdotes and thoughts about what it's like to study astrophysics. And yes... we both survived without drowning. :-)

L'Oréal Women in Science Prize

When I won the L'Oréal Women in Science prize back in 2009 they made this little video about my research (with a cameo from Chris Blake!) I give a very quick summary of how and why we search for dark energy, and what understanding it might teach us.

Brain Box

Quick fun 2 minutes by the Australian Academy of Science's "Brain Box" program.

Cosmic confusion II

How far can light travel in the expanding universe? Can we see an infinite distance? Here's a talk I gave to a scientific audience, but it's hopefully accessible to anyone who likes looking at graphs! This is the second half of the talk, for the first half see the next talk. Here's a copy of the spacetime diagrams, here's the Scientific American article, and here's a more technical artilce. (18mins)

Cosmic confusion I

This is actually the first half of the talk above, but it is much more mathematical, so a bit less accessible. But it does explain how galaxies can recede from us with velocities faster than the speed of light without violating relativity - and only needs (mostly) high-school maths. The slides are hard to read, so here's a copy. (11 mins)

Foundation Research Excellence Award

Another quick blurb made for me after I won the 2012 Foundation Research Excellence Award at UQ. Amusingly, I was overseas when this happened, so the poor quality sound and video is because I was shooting it on my phone!

Pint in the Sky - WiggleZ

This was the first "Pint in the Sky" episode, filmed using our amateur equipment in a pub in Perth. Alan Duffy and Katie Mack interviwing me about the WiggleZ Dark Energy survey, which was the big part of my research for about five years. Explains how sound waves created patterns in the distribution of galaxies. (And Ultimate Frisbee also gets a mention!) (13 mins)

Pint in the Sky - Peculiar motion

This was the continuation of the first "Pint in the Sky" episode with Alan Duffy and Katie Mack interviwing me now about the peculiar velocities of galaxies (any motion that isn't part of the smooth expansion of the unvierse). (5 mins)

Warp drives and bending time

A slightly entertaining talk I was asked to give about "warp drives"... not entirely as fantastical as they may seem, as people are genuinely looking into whether they're possible. This was in a series of talks put on by the Australian Academy of Science called "science fiction meets science fact". (1 hour)

Cosmological Confusion
Waterloo Astrophysics Seminar, September 2021

Fun talk in quiz style about the expansion of the universe and cosmic horizons.

To listen

And here are some radio interviews...

To read

And here are some popular science articles or interviews...

Misconceptions about the Big Bang
March 2005

Baffled by the expansion of the universe?

You're not alonge. Even astronomers frequently get it wrong.

Is the Universe Leaking Energy?
July 2010

Total energy must be conserved. Every student of physics learns this fundamental law. The trouble is, it does not apply to the universe as a whole

Unique, but not exceptional
August 2015

The specialness of our "Blue Marble" contrasts with our conviction that we are not privileged observers