Do you like it here? http://alohatube.in.net/ alohatube.com Einstein also predicted that clocks in different gravitational fields would tick at different speeds. For example, a clock in Boulder, Colo., which is a mile above sea level, would feel a slightly weaker gravitational pull than a clock at sea level in Washington, D.C. As a result, it would tick just a bit faster — and after 200,000 years it would be a full second ahead.