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Mars: Red Planet’s Rapid Formation Explains Its Small Size Relative to Earth

By Guest PostMay 27, 2011Scienceali pourmand, atmosphere, chemical behavior, chondrites, composition of chondrites, computer simulation, dauphas and pourmand, earth, embryos, enriqueta barrera, fine scale chronology, geophysicist, hafnium, lithophile elements, mantle of mars, mars, martian meteorites, national science foundation, nicolas dauphas, non volatile elements, nsf, radioactive decay, red planet, refractory, solar system, tungsten in meteorites, tungsten isotopic composition, university of chicago, xenon content

*Mars developed far more quickly than our blue planet*

Mars developed in as little as two to four million years after the birth of the solar system, far more quickly than Earth, according to results of a new study published in this week’s issue of the journal Nature.

The red planet’s rapid formation helps explain why it is so small, say the study’s co-authors, Nicolas Dauphas at the University of Chicago and Ali Pourmand at the University of Miami. (more…)

Scientists Discover Animal-like Urea Cycle in Tiny Diatoms in the Ocean

By Guest PostMay 19, 2011Sciencealisdair fernie, andrew allen, animal like urea cycle, atmosphere, carbon recycling, chris bowler, david garrison, deep ocean, diatoms, environmental health of marine ecosystems, genome, marine diatoms, metazoan, national science foundation, nsf, nutrient, nutrient metabolism in diatoms, pennate diatom, photosynthesis, phytoplankton, rna interference, silica, unique cell walls, urea synthesis

*Cycle enables marine phytoplankton to use carbon and nitrogen from their environment*

Scientists have discovered that marine diatoms, tiny phytoplankton abundant in the sea, have an animal-like urea cycle, and that this cycle enables the diatoms to efficiently use carbon and nitrogen from their environment. (more…)

Climate Change May Create Tipping Points for Populations, Not Just Species

By Guest PostOctober 23, 2010Environmentalpine, Arctic, biological effects of climate change, climate change, climate warms, daniel doak, duke university, earth, ecological challenges, ecologist, mountains of colorado, national science foundation, new mexico, nsf, plants, plants and animals, saran twombly, william morris

*Researchers measure survival, reproduction of thousands of arctic and alpine plants over six years*

As Earth’s climate warms, species are expected to shift their geographical ranges away from the equator or to higher elevations.

While scientists have documented such shifts for many plants and animals, the ranges of others seem stable. (more…)

NSF Renews Centers for Nanotechnology in Society

By Guest PostOctober 15, 2010Scienceanticipatory governance, arizona state university, atomic, barbara herr harthorn, center for nanotechnology, cns ucsb, david guston, molecular manipulation, molecular scale, myron gutmann, nano enterprise, Nanotechnology, national science foundation, nature-altering science, North America, nsf

*National Science Foundation awards more than $12.5M to study societal impacts of emerging technologies*

The National Science Foundation (NSF) recently renewed two important cooperative agreements totaling more than $12.5 million over five years. These awards leverage previous investments for studying the ethical, legal, economic and policy implications of the relatively new, nature-altering science called nanotechnology. (more…)

Tag Archives: nsf

Mars: Red Planet’s Rapid Formation Explains Its Small Size Relative to Earth

Scientists Discover Animal-like Urea Cycle in Tiny Diatoms in the Ocean

Climate Change May Create Tipping Points for Populations, Not Just Species

NSF Renews Centers for Nanotechnology in Society