Planetary scientists sharing ideas and discoveries.
Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission Directorate and by Hawai'i Space Grant Consortium and is a vital link for planetary and space sciences, and for learning how science works.
Supported by NASA's SMD Cosmochemistry Program and Hawai'i Space Grant Consortium.
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Archive of Earth Articles
Articles listed by publication date.
DATE POSTED |
HEADLINE ARTICLES |
PDF VERSIONS |
| OCT 2011 | Earth's Heat
by Linda M. V. Martel CosmoSparks Report - It is now possible to measure the radiogenic heat production inside Earth, previously estimated from element ratios in chondritic meteorites. |
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| APRIL 2011 | The Role of H2S in Amino Acid Synthesis on Primordial Earth and Elsewhere
by Linda M. V. Martel CosmoSparks Report - Intriguingly similar abundances of amino acids from historic lab samples and carbonaceous chondrites. |
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| 22 FEB 08 | Compositional Balancing Before Moon Formation
by G. Jeffrey Taylor The identical oxygen isotopic composition of Earth and Moon might be explained by exchange of material between the proto-Earth and the surrounding proto-lunar disk. |
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| 7 JULY 05 | Squeezing and Heating Rock to Scope Out How Metallic Iron Dribbled to the Center of the Earth
by G. Jeffrey Taylor Experiments showing how cobalt and nickel concentrate in molten metal shed light on the formation of Earth's metallic core. |
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| 13 APRIL 05 | Antarctic Guide to Martian Weathering
by Linda M. V. Martel Soils in the Antarctic Dry Valleys contain traces of silicate alteration products and secondary salts much like those found in Martian meteorites. |
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| 9 MAR 04 | Tiny Traces of a Big Asteroid Breakup
by Linda M. V. Martel Fossil meteorites and chromite grains record a hundred-fold increase in the number of meteorites that fell 480 million years ago compared to the meteorite influx today. |
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| 28 FEB 02 | Searching Antarctic Ice for Meteorites by Linda M. V. Martel Silver anniversary season: The vigorous life and times of the ANSMET team at Meteorite Hills resulted in a new set of 336 meteorites collected off the ice. |
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| 28 FEB 01 | Buckyballs and Gases May Mark Massive Extinction by G. Jeffrey Taylor Helium and argon isotopes in fullerenes suggest an impact triggered the incredible extinction that marks the end of the Permian period. |
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| 31 DEC 98 | Origin of the Earth and Moon by G. Jeffrey Taylor First hand report of the December 1998 conference on the formation and very early history of the Earth and Moon. |
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| 11 DEC 97 | Damage by Impact: the case at Meteor Crater, Arizona by Linda M. V. Martel A look at the pre- and post-impact environments at Meteor Crater, Arizona provides insight into Earth's impact history. Just how often does this sort of impact event occur on Earth? We'll examine the potential hazards. |
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| 21 DEC 96 | Life Underground by G. Jeffrey Taylor Some bacteria live on nothing but rock and water, extracting energy from chemical reactions rather than from sunlight. |
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| 21 DEC 96 | Meteorites from Mars, Rocks from Canada by Rachel C. Friedman There is more to Mars rocks than suspected fossils. Scientists are using ancient lava flows in eastern Ontario to understand the formation of a group of meteorites from Mars. |
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| 18 OCT 96 | Rules for Identifying Ancient Life by G. Jeffrey Taylor Scientists seeking the oldest fossils on Earth have developed rules for establishing that they have found fossils and that the fossils formed in place. |
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