Comment Re:You should know better. (Score 1) 69
I am well aware of this illogical nonsense.
The logic of relativity theory is well studied, there are no logical contradictions in it.
We don't know because we have never gone that fast.
You do not have to go _that_ fast to test and measure this: Hafele–Keating experiment 1971.
Also in, e.g., GPS satellites we measure this all the time.
Your body knows nothing about clocks or time.
So you are still less than half a meter long, have no wrinkles and no heart beat? Your body _is_ a clock, just not a very precise one.
If a clock on your spaceship differs from a clock on earth it does not mean that "time slowed down". It simply means that the physical mechanism of the clock on the spaceship has slowed down. [...] A clock does not measure time. It is merely a device which moves at a steady rate and for our own convenience and organizational purposes [...] If "billions of years" have passed outside of the spaceship then your body inside the spaceship has aged billions of years. Unless travelling really fast somehow magically slows your body's aging process.
No magic is needed, just rather simple physics. It would in fact be far more "magical" if it only affected clocks (all kinds of clocks from mechanical clocks over quartz watches to atomic clocks) but nothing else.
