[LeGrande]

They even flew atomic clocks around the globe and demonstrated that they had experienced less time passing. This particular phenomenon is about as ironclad as you get in an experimental science...

Not to quibble too much, but the clocks on GPS satellites run faster than earth bound clocks due to the acceleration of gravity. Their actual speed has much less effect than gravity.

[Charles H. (The_r0nin)]

I’m not talking about that particular effect. Several scientists (I’ll try to find the study) used commercial and military aircraft to circumnavigate and test relativity in particular. It was about 10 years or so ago...