"If you go up in a helicopter in New York and hover for 4 hours and then come back down to Earth you should be in Los Angeles, not New York ( if the Earth were really rotating ). To commence, I will refute your citations of websites on the grounds that they are HTML 1.0 sites written by nutcases who rant and rave quoting no credible sources. Do not assume because it is on the internet, it is real or even citable as a source without losing respect from people with any tangible concept of academia. Now I shall explain why the example you provided is flawed. If you take off in a helicopter over any city, you are using the spinning blades of the helicopter to displace air in a downwards vorticical force, providing lift. It is in this air that your helicopter is remaining, it is not in an intangible space or vaccuum. This air, too, moves around the world as the world moves around, as well as having further complexity added to the scenario in the way of air currents. A physical and immediate example you can use is, thicker stuff than air that moves slower, water (or any liquid), get a cup full of water and find a very small item that floats, say, drop a short hair in it, or a fleck of plastic, just to emulate your helicopter. Now rotate the cup, don't stir it, put the cup on a table, reach down and turn it. The object stays in a static position. Now the physics of both of these scenarios operate for different reasons but it is a similar example with a similar measurable result. Now stir that cup of water. Watch the object fall into the centre of it. This is another example of a different theory, but an illustration of gravity. Were our giant cup not being stirred, we would fall off. aussietinfoilhat __________________________________________________________________ Make your browsing faster, safer, and easier with the new Internet Explorer® 8. Optimized for Yahoo! Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/