How the Universe Works

Mike Rowe

Himself - Narrator / Narrator

Phil Plait

Self - Astronomer

Michelle Thaller

Self - Astronomer

Hakeem Muata Oluseyi

Self - Astrophysicist

Nina Lanza

Self - Planetary Scientist

Moogega Cooper

Self - Planetary Protection Engineer

Jani Radebaugh

Self - Planetary Scientist

Chris Mckay

Self - Astrobiologist

Dan Durda

Self - Planetary Scientist

Carly Howett

Self - Planetary Scientist

Paul M Sutter

Self - Astrophysicist

Kevin J. Walsh

Self - Astronomer

Amber Straughn

Self - Astrophysicist

Max Tegmark

Self - Theoretical Physicist

Alex Philippenko

Self - Astrophysicis

Katie Freese

Self - Cosmologist

Grant Tremblay

Self - Astrophysicist

Chiara Mingarelli

Self - Astrophysicist

Erik Dellums

Himself - Narrator / Self - Narrator

James S. Bullock

Self - Astrophysicist

Lawrence Krauss

Himself

Michio Kaku

Himself

Albert Einstein

Himself (Archive footage)

Clifford V. Johnson

Self - Theoretical Physicist

Richard Lintern

Himself - Narrator