French scientists used carbon-14 dating to determine the age of prehistoric wall paintings in the Niaux caves . They determined that the paintings were made using natural dyes approximately 13 thousand years ago. Use your knowledge of carbon-14 dating to determine which two statements are true. (Remember that the half-life of carbon-14 is 5.7 thousand years.) Use your knowledge of carbon-14 dating to determine which two statements are true. (Remember that the half-life of carbon-14 is 5.7 thousand years.) When the Niaux paintings were 11 thousand years old, they contained approximately 75% of their original carbon-14. In another 5.7 thousand years, the Niaux cave paintings will contain half as much carbon-14 as they currently do. Cave paintings that are 7.3 thousand years old would contain twice as much carbon-14 as the Niaux cave paintings. The Niaux cave paintings currently contain less than 1/8th of the carbon-14 they contained when originally painted. If scientists discovered other cave paintings with less carbon-14 than the Naiux cave paintings, those paintings must be younger.