Via Michael Nielsen, a page documenting what I really hope is the dorkiest family vacation ever: Project GREAT: General Relativity Einstein/Essen Anniversary Test Clocks, Kids, and General Relativity on Mt Rainier:
In September 2005 (for the 50th anniversary of the atomic clock and 100th anniversary of the theory of relativity) we took several cesium clocks on a road trip to Mt Rainier; a family science experiment unlike anything you’ve seen before.
By keeping the clocks at altitude for a weekend we were able to detect and measure the effects of relativistic time dilation compared to atomic clocks we left at home. The amazing thing is that the experiment worked! The predicted and measured effect was just over 20 nanoseconds.
I know that, fifteen years from now, it will be all but impossible to convince SteelyKid that I am not the biggest dork ever to walk the earth. I’m keeping this link, though, so at least I will know that there’s somebody out there far nerdier than I’ll ever be.