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10 million years needed to recover from mass extinction

(Phys.org) -- It took some 10 million years for Earth to recover from the greatest mass extinction of all time, latest research has revealed.

Space & Earth / Earth Sciences

created May 27, 2012 | popularity 4.4 / 5 (8) | comments 21 | with audio podcast

Carbon dioxide emissions reach record high

Emissions of heat-trapping carbon dioxide reached an all-time high last year, further reducing the chances that the world could avoid a dangerous rise in global average temperature by 2020, according to the International ...

Space & Earth / Environment

created May 29, 2012 | popularity 4.1 / 5 (8) | comments 26

UCLA life scientists view biodiversity through a whole new dimension

(Phys.org) -- How can blue whales, the largest animals on the planet, survive by feeding on krill, shrimp-like creatures that are the size of a penny? According to UCLA life scientists, it's all a matter of ...

Biology / Plants & Animals

created May 31, 2012 | popularity 5 / 5 (4) | comments 1 | with audio podcast

Meteorite hunt goes on, needs public's help

(Phys.org) -- A University of California, Davis, geologist is appealing for public help in tracking down pieces of the meteorite that blew up over El Dorado County on April 22.

Space & Earth / Space Exploration

created May 28, 2012 | popularity 5 / 5 (3) | comments 0

Life on Mars: just add carbon and stir

The building blocks of life have been discovered on Mars ... in Martian meteorites that fell to Earth.

Space & Earth / Space Exploration

created May 29, 2012 | popularity 3.3 / 5 (3) | comments 0

New strategy directly activates cellular 'death protein'

Researchers at Dana-Farber/Children's Hospital Cancer Center have devised a strategy to directly activate a natural "death" protein, triggering the self-destruction of cells. They say the development could represent a new ...

Chemistry / Biochemistry

created May 31, 2012 | popularity 5 / 5 (2) | comments 0 | with audio podcast

Some butterfly species particularly vulnerable to climate change: study

A recent study of the impact of climate change on butterflies suggests that some species might adapt much better than others, with implications for the pollination and herbivory associated with these and other ...

Biology / Ecology

created 6 hours ago | popularity 5 / 5 (1) | comments 0

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Life

Life on Earth:

Life (cf. biota) is a characteristic that distinguishes objects that have self-sustaining biological processes ("alive," "living"), from those which do not —either because such functions have ceased (death), or else because they lack such functions and are classified as "inanimate."

In biology, the science that studies living organisms, "life" is the condition which distinguishes active organisms from inorganic matter, including the capacity for growth, functional activity and the continual change preceding death. A diverse array of living organisms (life forms) can be found in the biosphere on Earth, and properties common to these organisms—plants, animals, fungi, protists, archaea, and bacteria — are a carbon- and water-based cellular form with complex organization and heritable genetic information. Living organisms undergo metabolism, maintain homeostasis, possess a capacity to grow, respond to stimuli, reproduce and, through natural selection, adapt to their environment in successive generations. More complex living organisms can communicate through various means.

In philosophy and religion, the conception and nature of life varies, and offer interpretations in the frameworks of existence and consciousness, and touch on many other related issues, such as, ontology, value, life stance, purpose, conceptions of God, the soul and the afterlife.

For more information about Life, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.

Related topics: earth , mars , nasa , microbes , amino acids