Can carbon 14 dating be used on stone
Libby reasoned that since the half-life of C years, the Djoser sample’s C14 concentration should be about 50% of the concentration found in living wood (for further details, see Arnold and Libby, 1949). Subsequent work with radiocarbon testing raised questions about the fluctuation of atmospheric C14 over time.
Scientists have developed calibration techniques to adjust for these fluctuations.
Sally Norton, a specialist keyhole surgeon for weight loss in the NHS and at Spire Hospital, Bristol, said: ‘I've been monitoring Obalon's progress over the last few years as I was very excited about the potential it could offer those patients who do not qualify for weight loss surgery but are struggling to lose weight and improve their health on their own.
Archaeologists believe Egypt’s large pyramids are the work of the Old Kingdom society that rose to prominence in the Nile Valley after 3000 B. Historical analysis tells us that the Egyptians built the Giza Pyramids in a span of 85 years between 25 BC.
Harris County Sheriff's Office lead homicide detective Mike Ritchie, pictured, said despite not recovering a body it is presumed that An Vinh Nguyen is dead as he was very close to his family and was in constant contact with them.
His car was recovered several days after he vanished'By investigating certain aspects of the case, where he was last seen, we were also able to develop a suspect Jerrett Allen.
A new gastric balloon procedure has become available in the UK - it sees patients swallow a capsule (pictured) which contains a deflated balloon and which is attached to a tube.
Once in the stomach, the tube is used to inflate the balloon.
Instead, in a 10-minute procedure, patients swallow a capsule the size of a large vitamin pill which contains a deflated balloon.
Brandon Lyons, left, has been charged with the capital murder of Glenser Soliman, who was lured to his death after using a gay hook-up app.
Police are searching for Lyons's cousin Jerrett Allen, right, who has been charged in his absence with credit and debit card fraud Officers believe Allen used Nguyen's credit card in El Paso, Texas in early to mid-April.
Jerrett Allen was today charged with credit and debit card abuse and through our investigation we were able to link Brandon Lyons and Jerrett Allen together.'They are cousins and they were living together at the time that both men disappeared.'So again, Jerrett Allen, his whereabouts are unknown.
His last known location was in El Paso, Texas in early to mid-April. He confirmed neither of the victims knew each other, but but used gay social media chat sites.