It's an impossible question to answer -- unless you're Neil deGrasse Tyson. Watch the famed astrophysicist take on a young boy's loaded query, and knock it out of the park.
Astrophysicist Neil deGrasse Tyson frequently uses Twitter to rate how well popular sci-fi films follow scientific principles. How did Christopher Nolan's "Interstellar" stack up?
The famed astrophysicist says there's a reason some chemical elements are named for places in the US -- and that we don't have to leave those glory days in the past.
The "Cosmos" presenter, played here by Kenan Thompson, attempts to help the "Fox And Friends" presenters grasp the cruder points of climate change. It isn't easy.
Carl Sagan's legacy makes a return in a major television event happening in 2014.
Astrophysicist Neil deGrasse Tyson explains his "meh" attitude toward "Star Wars" and why he would rather be Captain Kirk than Captain Picard.
Science geek worlds collide as Bill Nye the Science guy put astrophysics hero Neil deGrases Tyson in an arm lock that would make Hulk Hogan proud.
Astrophysicist Neil deGrasse Tyson tackles the difficult calculations required to determine the weight of superhero Thor's otherworldly weapon.
Astrophysicist, director of the Hayden Planetarium and all-round awesome educator Neil deGrasse Tyson has brought his radio program to YouTube.
Geek hero Neil deGrasse Tyson uses his science superpowers to find the real red dwarf that the fictional planet Krypton once orbited.