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.
Our planet has mostly been much hotter and more humid than we know it to be today, and with far more carbon dioxide (the greenhouse gas) in the atmosphere than exists today. The notable exception is 300,000,000 years ago during the late Carboniferous Period, which resembles our own climate and atmosphere like no other.