impact

Historical Extraterrestrial Impact Unlikely According to New Report

Evidence that has been at the center of the hypothesis to support the Younger Dryas impact event has been called into question by a new study led by U.S.L Geological Survey scientists, who believe that the evidence is actually the result of natural processes. Elevated levels of iridium, magnetic spherules, and titanomagnetite grains, collectively called

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Limited Nuclear War Could Halt Global Warming, Short Term, NASA Predicts

The scientists used a general circulation model known as ModelE (developed at NASA’s Goddard Institute for Space Studies, New York). The model calculates ocean-atmosphere coupling effects in addition to allowing varying aerosol inputs.

The initial input for the simulation was 5 teragrams (megatons) of black carbon particles injected into Earth’s upper troposphere. This is the estimated result of the surface detonation of 100 Hiroshima-size bombs (each equivalent to 15K tons of TNT).

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Newest Gulf Report: Oil, Soot and Dead Animals on Sea Floor

Reporting her results from a fifth Gulf of Mexico expedition ending this past December,  University of Georgia marine scientist Samantha Joye has been to the bottom and back, and her findings are anything but optimistic. Her team has found numerous expanses of oil and soot covered sea floor that were “chemically finger-printed” as deriving from

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9 ‘Planetary Boundaries’ Cited as Crucial for Human Survival

A group of 30 leading Earth and Environmental scientists is proposing “nine planetary boundaries”, or “safety zones”, that must not be crossed, in order to preserve the planetary and environmental balance that human civilizations (and much of the rest of the biosphere) require. Crossing these boundaries–and three of them may have already been crossed–could “generate unacceptable environmental change for humanity.”

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