In this week's QA, I talk about what's driving the expansion of the Universe, how big the observable Universe is to the actual Universe, and what will happen to dogs in gravity.

00:00 Start

00:26 What's driving the expansion of the Universe?

04:01 How big is the observable Universe compared to the actual Universe?

07:25 Do people watch videos or listen to my podcasts?

10:37 Will dogs enjoy lunar gravity?

12:59 Why aren't we looking deeper in the Kuiper Belt?

15:54 What would be some good ways to explore lava tubes?

19:36 What happened to the Overwhelmingly Large Telescope?

22:48 Would space LIGO be more sensitive?

27:56 What's the most like Great Filter?

31:07 Why do we talk about distance in form of time?

35:14 Any future collaborations with Isaac Arthur?

35:58 How long will the Mars helicopter survive?

40:07 When will NASA incorporate Starship into its plans?

42:15 How dangerous is the Kessler Syndrome?

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