This episode of Astronomy Cast is sponsored by Barkbox.

Visit barkbox.com slash astro and get a free box with your 6-12-month subscription.

Here at Astronomy Cast we've been super lucky to have sponsors with products we truly love.

Each barkbox comes with 4-6 different monthly surprises for my dog Eddie.

There are all natural chews perfect for an hour long distraction while we record and tiny

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Here we go the director of technology and citizen science at the astronomical society of the

Pacific and the director of CosmoQuest. Hey Pamela how you doing? I'm doing well how are you doing

Fraser? Doing great I still have to I have to read that one very slowly and carefully and to get

through your new title hopefully everyone is caught up to speed now on the all the new changes

and all the new awesomeness. Yes and and I want to say many thanks to all of you who have donated

to us the past two weeks. We're good to cover our bills this month which I'm sure Suzy and Chad

will deeply appreciate please keep giving so we can pay them next month too. We love all of you

you're fabulous and you keep us going. For those of you who are watching the livestream you just

saw Pamela make a little heart with her hands. Let's get on with the show so we love to destroy the

universe and also rebuild it. Today we begin a new series where we destroy and rebuild. Let's talk

about some existential threats we face and ways we could recover starting with the sort of

damacles hanging over our heads killer asteroids. I'm going to admit something here which is that

the existential threat of killer asteroids was actually what got me into space journalism in the

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