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From Mercury to Morocco, and onward to Yale: a meteorite’s tale

Talk about a precious stone — the largest piece of the only known meteorite from the planet Mercury has found its way to Yale, where it is now on display at the Peabody Museum of Natural History.

Known as NWA 7325, the fist-size, greenish space rock is a rarity among rarities: there just aren’t many verified planetary meteorites. Scientists know of about 70 from Mars and, until now, none from any of the other planets in Earth’s solar system. There are about 180 known meteorites from the moon. NWA 7325 is the first believed to be from Mercury. (more…)

Species Extinction Rates Have Been Overestimated, New Study Claims

By Guest PostMay 29, 2011Natureafrica, asia, biodiversity, canada, center for tropical forest science, central america, China, earth, environmental decision making, experience a rain forest, extinction debt, extinction rates, fangliang he, global extinction, guangzhou, habitat loss, killing the dinosaurs, mathematical proof, meteor, photosynthesis, plant biomass, risk of extinction, south america, species area relationship, species extinction rates, stephen hubbell, sun yat sen university, tropical forest ecologist, university of Alberta

*However, researchers say, global extinction crisis remains very serious*

The most widely used methods for calculating species extinction rates are “fundamentally flawed” and overestimate extinction rates by as much as 160 percent, life scientists report May 19 in the journal Nature.

However, while the problem of species extinction caused by habitat loss is not as dire as many conservationists and scientists had believed, the global extinction crisis is real, says Stephen Hubbell, a distinguished professor of ecology and evolutionary biology at UCLA and co-author of the Nature paper. (more…)

Tag Archives: meteor

From Mercury to Morocco, and onward to Yale: a meteorite’s tale

Species Extinction Rates Have Been Overestimated, New Study Claims