age of the Earth


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age of the Earth

The oldest rocks found in the Earth's crust have been assigned ages of 3.96 billion (109) years from radioisotope studies, but other properties of the rocks support the belief that the planet shares a common origin with the rest of the Solar System, about 4.57 billion years ago. The cycling of the crustal material by plate tectonics (see Earth) and the eroding effects of ice, water, and wind mean that none of the earliest rocks survive intact and that evidence of an early meteoritic bombardment, so apparent on the Moon, Mercury, and Mars, is absent. See Earth; Solar System, origin.
References in classic literature ?
If you would know the age of the earth, look upon the sea in a storm.
New proposed state science standards for public schools in New Mexico are drawing criticism for limiting the scientific study of evolution, downplaying human impact on climate change and failing to explain adequately the age of the Earth.
From this perspective, ideas that challenge heliocentrism or the age of the earth may not be an honest disagreement unless there are new data or analyses that have not been considered by the scientific community.
We know, however, from radioactive measurements that the age of the earth is at least 1,500 million years.
Each of these paradigm shifts required a recalibration of quantities of time (the length of the work day, the age of the earth, the weeks or minutes required to send a message across a continent) as well as a reconsideration of the self, the nation, and the species in an evolving chronoscape.
As the antiquity of the age of the earth was being investigated in the 1800s and accepted many years before Darwin's critical publication, leadership within the Presbyterian Church played a prominent role.
These include the mistaken belief that Charles Lyell established the ancient age of the earth, the groundless story that the Beagle's captain wished for a companion on the voyage so as not to go mad, and most classic, and most incorrect, that Darwin was struck by the shape of the beaks of the finches while in the Galapagos Islands.
All the zeros trailing after the age of the Earth make of climate change a process of very longue duree.
We are using standard methods to compute the age of the Earth, but having access to these ancient samples gives us new data, and allows us to refine the measurement.
Passages that contemplate natural features in his adopted hometown reveal a humbler, if not reverent, attitude: "In the trees looming about, insects scratched, hummed, sang in bass, tenor, soprano counting the seconds and counting, I suspected, the age of the earth.
These questions have been known to lead to interesting discussions about the age of the Earth, the origin of the Earth, and the origin of life.
AROCK map sculpture of Britain representing three billion years of the geological age of the Earth will be unveiled today as the latest feature on a city's tourist trail.