9.19. In 1991 a couple hiking discovered a body (the Ice Man) sticking out of the ice in a glacier in the Alps near the border between Austria and Italy. The body was somewhat unusual in color and size. Beside the body was a copper axe. Using radioactive carbon dating techniques on a piece of tissue, scientists determined that the level of activity was 53% of its value for a living person. How old was the body? 9.22. T half-life second abundar 9.23. Th 24,000 y 9.24. Wh (11/2 = 2.