What is Sea Level?

FREE FACT: An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size.

A special thanks to our Subbable.com supporters:
Robby Weisenfeld
Gustav Delius
Ike
https://www.youtube.com/TheNilFacts

And to Audible.com - FREE audiobook at http://www.audible.com/minutephysics

MinutePhysics is on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder

Thanks to Nima Doroud for contributions. Created by Henry Reich