Chilean Earthquake Shifts Earth's Axis, Shortening Day

http://www.businessweek.com/news/2010-03-01/chilean-quake-likely-shifted-earth-s-axis-nasa-scientist-says.html

Amazing how much one event on one part of the planet can alter the entire planet.

May not be much of an effect really.

The axis completes a full cycle approximately every 26,000 years -
http://en.wikipedia.org/wiki/Milankovitch_cycles


There is the concept of time dilation which is more interesting physics in my opinion. Clocks on the space shuttle in orbit age (tick) less than identical one's back on Earth.