Imagine that we go inside a black hole then it is said that as our speed increases time decreases and after that time comes to past, is that true? Although I read that IQ is a constant value and can not increase after the age of 10 years, but why every new IQ test giving new results, with the same person? If it is, then how can we trust, on anyone's IQ is constant or not? or Is it can be increase or decrease by the time?