Inadvertently, the human page turner, that fallible and sometimes reviled third party onstage, has been absent from most of Haywoodâs recent performances, a consequence of the wireless age. The advantages are obvious: The iPad is portable, discreet, always well-rested.
He measured the half-life of Carbon-14 to be about 5,568 years. However after about 50,000 years there is so little Carbon-14 left in the specimen that it is very hard, almost impossible, to calculate its age. (Van Der Merwe) Libby ran many tests on items where the age was known, or estimated by other means.
(Thatâs the equivalent of 500 years of CO2 emissions produced in the U.S. at current levels.) The change in pH has troubled researchers in the recent years, as they predict ocean acidity will more than double by 2100 if fossil fuels are burned at todayâs rate.