Dramatic shift from simple to complex marine ecosystems occurred 250M years ago at mass extinction
General Science / Archaeology & Fossils
Nov 23, 2006 |
4.5 / 5 after 65 votes |
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The earth experienced its biggest mass extinction about 250 million years ago, an event that wiped out an estimated 95% of marine species and 70% of land species. New research shows that this mass extinction did more than ...
Seismolgists get handle on heat flow deep in Earth
Space & Earth science / Earth Sciences
Nov 23, 2006 |
4.6 / 5 after 42 votes |
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Earth's interior is not a benign world that only stores the geologic history of our planet. Geologists now see the normally assumed placid inner Earth as a dynamic environment filled with exotic materials and ...
Resilient Form of Plant Carbon Gives New Meaning to Term ‘Older than Dirt’
Space & Earth science / Earth Sciences
Nov 23, 2006 |
4.6 / 5 after 33 votes |
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A particularly resilient type of carbon from the first plants to regrow after the last ice age – and that same type of carbon from all the plants since – appears to have been accumulating for 11,000 years in the forests of ...
Scientists lose instruments, gain first look at seafloor formation
Space & Earth science / Earth Sciences
Nov 23, 2006 |
4.4 / 5 after 40 votes |
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Ordinarily, losing almost all of one's instruments would be considered a severe setback to any scientist. But when Maya Tolstoy, a marine geophysicist at the Lamont-Doherty Earth Observatory, a member of the ...
Serengeti Patrols Cut Poaching of Buffalo, Elephants, Rhinos
Nov 23, 2006 |
4.1 / 5 after 8 votes |
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A technique used since the 1930s to estimate the abundance of fish has shown for the first time that enforcement patrols are effective at reducing poaching of elephants, African buffaloes and black rhinos in ...
Spacewalkers Tee Off on Science, Mechanics
Space & Earth science / Space Exploration
Nov 23, 2006 |
3.5 / 5 after 6 votes |
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Two International Space Station crew members wrapped up a 5-hour, 38-minute spacewalk from the Pirs docking compartment airlock at 12:55 a.m. EST Thursday. The spacewalk included a golf shot that merited a ...
Measuring fetal oxygen does not reduce Caesarean rate, researchers find
Nov 23, 2006 |
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Measuring the amount of oxygen in the blood of a fetus during labor has no bearing on whether a Caesarean section is performed and does not affect the health of the newborn baby, researchers at UT Southwestern Medical Center ...
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