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We met for a drink on 11th April (just over a week after I sent the first message) I was late but luckily he waited..still reminds me of that today!

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The Mayan calendar used 3114 BC as their reference.

More recently is the radiocarbon date of 1950 AD or before present, BP.

There are two techniques for dating in archaeological sites: relative and absolute dating.

Relative dating stems from the idea that something is younger or older relative to something else.

The Vivaldi scholar Michael Talbot writes that he ‘has remained unknown, even to specialists’.However, the principle of carbon-14 dating applies to other isotopes as well.Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.So I said maybe it's 5,730 years since this bone was part of a living animal, or it's roughly that old.Now, when I did that, I made a pretty big assumption, and some you all have touched on this in the comments on You Tube on the last video, is how do I know that this estimate I made is based on the assumption that the amount of carbon-14 in the atmosphere would have been roughly constant from when this bone was living to now?However, radioisotope dating may not work so well in the future.