Here are five facts about online dating: Online dating has lost much of its stigma, and a majority of Americans now say online dating is a good way to meet people.

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By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon-14 decay can be worked out, thereby giving an age for the specimen in question.

But that assumes that the amount of carbon-14 in the atmosphere was constant — any variation would speed up or slow down the clock.

Online dating use among 55- to 64-year-olds has also risen substantially since the last Pew Research Center survey on the topic.

Today, 12% of 55- to 64-year-olds report ever using an online dating site or mobile dating app versus only 6% in 2013.

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Dating does not include listings for all dating sites.Various geologic, atmospheric and solar processes can influence atmospheric carbon-14 levels.Since the 1960s, scientists have started accounting for the variations by calibrating the clock against the known ages of tree rings. Climate records from a Japanese lake are set to improve the accuracy of the dating technique, which could help to shed light on archaeological mysteries such as why Neanderthals became extinct.Carbon dating is used to work out the age of organic material — in effect, any living thing.Digital technology and smartphones in particular have transformed many aspects of our society, including how people seek out and establish romantic relationships.