Originally published at: http://www.howtogeek.com/176946/what-is-sea-level/
That might sound like an easy question to answer, but there is more to it than you may be aware of. How easy is it to determine ‘sea level’ overall? How is ‘sea level’ measured, especially for inland areas far away from large bodies of water? Learn the answers these questions and more in this wonderfully informative video from YouTube channel MinutePhysics!