Dark matter, black holes, galaxies, gravity, the universe, and everything: Mark interviews Dr. Ethan Siegel, PhD in Theoretic Astrophysics, Professor, and astrophysics & space writer for Forbes Magazine in this fantastic journey through the outer reaches of space. Also: ABBA reunites!, 4 new elements are named, praying mantis named after Ruth Bader Ginsburg, and more! Enjoy!

More about the wonderful Ethan Siegel!

Who wore it better? Ginsburg or Mantis?

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