The organic carbon in the soils has been stripped away by wind or water, so scientists can't use carbon-14 dating
to estimate when those wet spells might have occurred, says Muhs.--S.P.
Herodotus, the first philosopher of history, may not have been too sophisticated in the fields of satellite cartography, evolutionary biology, and the physics of carbon-14 dating
, but he had something in common with the author of this book.
The carbon-14 dating
is "a good piece of work," he says, "but it's not particularly relevant."
has put the age of two of the plants out in the Namib Desert at roughly 1,500 years and counting.
of 100 of the specimens show that the cave has been almost continuously occupied during the past 40,000 years, which indicates ice didn't cover the cave's entrance for any extended period.
Miller's team also used carbon-14 dating
and a similar technique that relies on the radioactive decay of uranium atoms.
Oceanographers had previously relied on the carbon-14 dating
technique to judge the age of deep-sea sediments, but this method reaches back only 45,000 years.
From carbon-14 dating
of the sediment core layers, Bond pinpointed the ages of the peak coolings to 1,050, 3,050, 3,950, 5,650, and 8,050 years ago, with each cold spell lasting about 800 years.
Using the carbon-14 dating
technique, Stute and his colleagues determined an age for each water sample.
The scientists, from the University of Pisa and the University of Milan, used carbon-14 dating
to determine the age of ancient Adelie bones, feathers, eggs, and guano.
In the April 30 SCIENCE, Stanley and Warne reported that carbon-14 dating
technique suggested that various parts of the delta were sinking 1 to 5 centimeters per decade.
of organic material on the terrace indicates that the uplift occurred between 500 and 1,700 years ago.