Sentences with phrase «oldest measurements date»
Currently we do not know because our oldest measurements date back less than 40 years.»
https://www.newscientist.com/ Not exact matches
The researchers determined from the isotope ratio that the Taylor Glacier samples were 120,000 years old, and validated the estimate by comparing the results to well - dated ice core measurements of atmospheric methane and oxygen from that same period.
An overview of the main technologies used to date historic structures and their components focusing on dendrochronology, radiocarbon dating and Do Varves, Tree - Rings, and Radiocarbon Measurements Prove an Old Earth?
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But the measurements to date have not shown whether the carbon emitted was greater than carbon absorbed, or how old the carbon emitted was.
«These authors [Hantemirov and Shiyatov] state that their data (derived mainly from measurements of relic wood dating back over more than 2,000 years) included 17 ring - width series derived from living trees that were between 200 - 400 years old.