7,847 results
7,847 results for: Geology
- Math
Fractured Granite and Fractal Prints
A rectangular slab of polished granite gives an impression of solidity and permanence. With its straight lines and glossy surface, it’s an elegant, humanmade artifact meant to stand as a timeless monument or serve as an impermeable skin for a sleek skyscraper. A fractal stone print. Nat Friedman A two-sided fractal stone print by Nat […]
- Earth
The Fires Below
Underground coal fires help shape the landscape on many scales and in many ways, some transient and some long-lasting.
- Earth
Eye of the Tiger
Recent research has upended a 130-year-old, previously unchallenged theory about how the semiprecious stone called tiger's-eye is formed.
- Archaeology
Early New World Settlers Rise in East
New evidence supports the view that people occupied a site in coastal Virginia at least 15,000 years ago.
- Earth
Sulfur Studies: Early Earth’s air was oxygen-poor
Analyses of ancient sulfide minerals and the modern organisms that create sulfides are giving scientists a better idea of what Earth's atmosphere and oceans may have been like billions of years ago.
- Planetary Science
Rocks on the ice
Pristine fragments of a meteorite that fell January 18 in the frozen Yukon and that remained frozen until they were delivered to a NASA laboratory may reveal much about the earliest days of the solar system.
- Humans
From the January 7, 1933, issue
ATOM BUILDING KEEPS STARS SHINING, SAYS A.A.A.S. HEAD The building up of other heavier atoms out of hydrogen stokes the internal heat of the stars, including the sun, Prof. Henry Norris Russell, Princeton University astronomer recently elected president of the American Association for the Advancement of Science, suggested in the Maiben lecture before the Association. […]
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Evolution’s Death Row: Groups surviving mass extinction still go bust
Groups of species may persist through major extinction events only to die off in the aftermath.
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- Paleontology
Learning from the Present
New field studies of unfossilized bones, as well as databases full of information about current fossil excavations and previous fossil finds, are providing insights into how complete—or incomplete—Earth's fossil record may be.
- Earth
Shifting Sands
Sand dunes can provide scientists with clues about ancient patterns of wind and precipitation.
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