Check out this really cool science fact about classic Christmas film ‘It’s a Wonderful Life’

1946 film based on 1943 story ‘The Greatest Gift’ by Philip Van Doren Stern

DETROIT – An annual NBC tradition is airing “It’s a Wonderful Life” on Christmas Eve -- but there’s something you might not know.

There’s a super cool science angle early in the movie that you might want to know about!

It happens near the beginning, in the scene where the angels in heaven choose an angel named Clarence to head to Earth to save George Bailey.

Watch the video above to see Paul Gross’ explanation.