| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In the 1940s chemist Willard Libby discovered this method of dating ancient artifacts | carbon-14 dating | $1,600 | DJ | ARCHAEOLOGY | 2008-10-03 | #5535 | |
| First used in the 1950s, this method of dating is accurate for remains up to 8,000 years old | carbon-14 dating | $400 | DJ | ARCHAEOLOGY | 1990-06-19 | #1352 | |
| This method of dating can tell the age of an artifact that is up to 40,000 years old | carbon-14 dating | $600 | DJ | ARCHAEOLOGY | 1988-12-09 | #985 |