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Greg Osmond
May 10, 2013 09:05PM

I was watching two Minke whales for one hour today near my home in Woody Point, ...
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May 09, 2013 08:05PM

The Good Force be with you! Well done, Team Curiosity! Keep it up! Live fo...
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amazing !
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Documentation on the Seine barges in the 17th century is scant, but apparently m...

Biogeochemistry

Biogeochemistry

    • Marine carbonate chemistry Featured Article Marine carbonate chemistry Marine carbonate chemistry

      The ocean represents the largest surficial carbon reservoir (~38,000 Pg C) of Earth's carbon cycle. The mean concentration of inorganic carbon in the ocean is about 2.3... More »

    • Mercury Featured Article Mercury Mercury

      Mercury is a chemical element that occurs naturally in the environment and exists in several forms.  Previous Element: Gold Next Element:... More »

    • Calcium Featured Article Calcium Calcium

      Calcium is the chemical element with atomic number 20; it has an atomic mass of 40.078 atomic mass units (amu). The chemical symbol for calcium is Ca. Calcium is a soft gray... More »

    • Krebs cycle Featured Article Krebs cycle Krebs cycle

      The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is one of the most important reaction sequences in biochemistry. Not only is this series of... More »

    • Health effects of nickel Featured Article Health effects of nickel Health effects of nickel

        Pure nickel is a hard, silvery-white metal, which has properties that make it very desirable for combining with other metals to form mixtures called alloys. Some... More »

    • Arctic Mercury Cycling and Ice Cover Featured Article Arctic Mercury Cycling and Ice Cover Arctic Mercury Cycling and Ice Cover

      Eggs Show Arctic Mercury Cycling May Be Linked to Ice Cover An international research team working with National Institute of Standards and Technology (NIST) scientists at the... More »

    • Acid sulfate soils Featured Article Acid sulfate soils Acid sulfate soils

      Main source: K.Ljung, F.Maley, A.Cook & P.Weinstein. Acid sulfate soils and human health. A Millennium Ecosystem Assessment. Environment International 35 (8), 1234-1242.... More »

    • Extremophile Featured Article Extremophile Extremophile

      An extremophile is an organism adapted to unusual limits of one or more abiotic factors in the environment. Some of the extreme conditions are temperature, pH, high salinity,...

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    • Zinc Featured Article Zinc Zinc

      Previous Element: Copper Next Element: Gallium ... More »

Recently Updated
Cadmium Last Updated on 2013-05-04 at 14:10 Cadmium is a very soft, silvery-white metallic element. Its atomic number is 48, with the atomic symbol Cd. It is so soft that it can be cut with a knife. Cadmium... More »
Anthropogenic and natural air pollution emissions Last Updated on 2013-04-26 at 02:57 Air pollutant emissions (commonly referred to as simply emissions) is the term used to describe any gases, liquid droplets and solid particulates which are emitted or... More »
Seawater Last Updated on 2013-03-28 at 17:22   Seawater is a mixture of various salts and water. Most of the water in the ocean basins is believed to originate from the condensation of water found in... More »
Evapotranspiration Last Updated on 2013-03-21 at 18:53   Introduction Evapotranspiration (ET) is a term describing the transport of water into the atmosphere from surfaces, including soil (soil evaporation), and... More »
Extremophile Last Updated on 2012-12-23 at 20:24 An extremophile is an organism adapted to unusual limits of one or more abiotic factors in the environment. Some of the extreme conditions are temperature, pH, high salinity,... More »
Biogeochemical cycles Last Updated on 2012-10-03 at 11:47 Biogeochemical cycles are pathways for the transport and transformation of matter within four categorical areas that make up planet Earth (biosphere, hydrosphere,... More »
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