According to the special theory of relativity, while traveling at very high speed your pulse rate
A) increases.
B) decreases.
C) remains unchanged.
Question 2
According to relativity theory, if a space trip finds a son or daughter biologically older than their parents, then the space trip is taken by the
A) son or daughter.
B) parents.
C) either of these
D) neither, it can't be done.