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A team led by John E. Henningsen, an ornithologist and

April 24, 2019 by Paul Fletcher

A team led by John E. Henningsen, an ornithologist and lead author of the paper from the University of York, has now identified the bluestone, which, he says, is "more like a pelt to the bone, with the bones being more or less identical." They've also found some evidence that the stone was a type of limestone. "It's one of the most enigmatic stones found in the world today," says Pearson, adding that it was probably the oldest known known stone in the world.

He says that other elements of the stone have been found in the quarry, including arsenic, which is what scientists believe might have caused the stones' appearance.

"We have evidence to suggest that it may have been mined in a different way in the past because of the high temperatures, and because of the low concentrations of arsenic, which in turn may have affected the appearance of the limestone."

Pearson agrees, pointing out that earlier digs into Stonehenge showed that the "fertilized brine" rocks were quite rare. But he says the study should have yielded some material comparable to Stonehenge's and that if the evidence had been more robust, the stone might have been found even sooner.

"What we have here is evidence that we've actually found and preserved very rare minerals in this area, but there are also other indications that there are other things there of very very high importance."

The findings of the new research have been published in PLOS ONE.This year has been a rollercoaster of sorts for Microsoft. It has been tough on Linux. Linux's popularity has grown quickly. It's grown even more popular in many other areas. And as we have seen with Windows 8, Microsoft has always looked for ways to improve on Windows.