Reimer and colleagues point out that Int Cal13 is just the latest in calibration sets, and further refinements are to be expected.
Radiocarbon dating was invented in the 1950s by the American chemist Willard F.
Libby and a few of his students at the University of Chicago: in 1960, he won a Nobel Prize in Chemistry for the invention.
Radiocarbon dating is one of the best known archaeological dating techniques available to scientists, and the many people in the general public have at least heard of it.
But there are many misconceptions about how radiocarbon works and how reliable a technique it is.
So, in other words, we have a pretty solid way to calibrate raw radiocarbon dates for the most recent 12,594 years of our planet's past.
As you might imagine, scientists have been attempting to discover other organic objects that can be dated securely steadily since Libby's discovery.
Even better than that, it can be used on site without needing to send samples away.
Carbon dating determines the age of archaeological objects, or how long ago a creature died, by measuring the amount of Carbon -14 remaining inside.
The time it takes for one half of a radioactive isotope to decay is known as its ‘half-life.