One of the more entertaining aspects of science is when something shows up that has no right to be there:

Scientists are baffled after carbon dating showed the skull, a woman's which was found near [New Zealand's] capital, Wellington, dates back from 1742 – decades before Cook's Pacific expedition arrived in 1769.

I'd like to know the precise dating technique used. Back when I was studying such things, radio carbon dates usually had margins of error much larger than 20 years.