A 26-year-old biologist makes a trip to study alien life-forms on a distant planet 10 light years away. The round-trip including a stay of 1 year in the distant planet takes 21.5 years according to the clock on earth. The biologist's son is 3 years old when she leaves. Assume that the planet is not moving with respect to Earth, and the speed is the same for both the outbound and inbound parts of the journey. What is the difference in age between the biologist and her son after she returns to Earth?

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The Answer of A 26-year-old biologist makes a trip to study alien life-forms on a distant planet 10 light years away. The round-trip including a stay of 1 year in the distant planet takes 21.5 years according to the clock on earth. The biologist's son is 3 years old when she leaves. Assume that the planet is not moving with respect to Earth, and the speed is the same for both the outbound and inbound parts of the journey. What is the difference in age between the biologist and her son after she returns to Earth?

A 26-Year-Old Biologist Makes a Trip to Study Alien Life-Forms