This is not an attempt at humor or controversy. I spend my spare time trying to find truth. I have been trying to understand some of Physic's theoretical ideas, and to my chagrin, many of them seem preposterous. I hope there are people out there that have the time and patience to help me understand some of these theories. Time Travel Theory : Two people of the same age are on Earth. The year is 2000, and they are identical twins, twin A and twin B, at the age of 10. Twin A boards a spaceship and begins to travel near the speed of light, to a distant planet, many light years away. Twin B continues a normal life, remaining on earth. Fast forward to the year 2040, a time period of 40 years has passed. Twin B, still on earth is now 50 years of age. Twin A has just returned to Earth. It is generally considered (unless I am wrong. if so please correct me) that twin B has aged 40 years, but twin A has not, due to traveling near the speed of light. QUESTION: During the 40 year period, the Earth has circled the Sun 40 times, is Twin A not also 50 years of age? Thank You, Gregg.