Dr. Mack returns with a new introduction and updates on… listener questions! The universe, dimensions, asteroid bags and cosmic vertigo with the amazing Astro Katie, AKA Dr. Katie Mack. Part 1 was a primer on all things cosmological, from particle physics to black holes, so listen to that first then hop to this episode to get all your questions answered.

Visit Dr. Mack’s website and follow her on Instagram, Twitter, YouTube and TikTok

Buy Dr. Mack's new book: The End of Everything (Astrophysically Speaking)

More episode sources & links

Smologies (short, classroom-safe) episodes

Sponsors of Ologies

Transcripts and bleeped episodes

Become a patron of Ologies for as little as a buck a month

OlogiesMerch.com has hats, shirts, masks, totes!

Follow @Ologies on Twitter and Instagram

Follow @AlieWard on Twitter and Instagram

Editing by Steven Ray Morris and Mercedes Maitland of Maitland Audio Productions

Transcripts by Emily White of The Wordary

Website by Kelly R. Dwyer

Theme song by Nick Thorburn