Nasa did some experiments with the SR71 (and possibly the space shuttle) where an atomic clock was placed on board the aircraft after being synchronized with an atomic clock on the ground. After the flight there was a slight time difference, with the clock on the earth being ahead.
I remember reading a news article about the particle accelerator. They did some experiment which produced some strange results. I dont remember the details but the particles were actually traveling back in time and arriving in the starting position instantly when they were fired.
