End of the world dating

Online dating sites use market metaphors to match people.

The civilisation's sudden collapse has also been hotly debated.

Mooted causes include disease, foreign invasion and deforestation or climate change that led to a prolonged, devastating drought.

The estimate closely matches that of a decades-old benchmark for Mayan dating, the so-called Goodman-Martinez-Thompson method.

According to the Goodman-Martinez-Thompson estimate, the big victory occurred around AD 695-712.

"Jasaw Chan K'awiil's defeat of Calakmul followed a series of great wars between Tikal, Calakmul and Dos Pilas between AD 657 and 677 that resulted in the defeat of Nuun Ujol Chaak," it says.