The fuel of evolution: A new hypothesis about how complex life emerged on Earth
When life on Earth first emerged about 4 billion years ago, it was simple by today's standards.
Oct 22, 2010 |
4.8 / 5 (47) |
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Professor: We have a 'moral obligation' to seed universe with life
(PhysOrg.com) -- Eventually, the day will come when life on Earth ends. Whether that’s tomorrow or five billion years from now, whether by nuclear war, climate change, or the Sun burning up its fuel, the last ...
Feb 09, 2010 |
3.1 / 5 (49) |
114
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New evidence supports 'Snowball Earth' as trigger for early animal evolution
A team of scientists, led by biogeochemists at the University of California, Riverside, has found new evidence linking "Snowball Earth" glacial events to the rise of early animals.
Space & Earth / Earth Sciences
Oct 27, 2010 |
4.3 / 5 (19) |
39
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A small step for lungfish, a big step for the evolution of walking
The eel-like body and scrawny "limbs" of the African lungfish would appear to make it an unlikely innovator for locomotion. But its improbable walking behavior, newly described by University of Chicago scientists, ...
Dec 12, 2011 |
4.5 / 5 (16) |
11
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Study finds unprecedented Arctic ozone loss
(PhysOrg.com) -- A NASA-led study has documented an unprecedented depletion of Earth's protective ozone layer above the Arctic last winter and spring caused by an unusually prolonged period of extremely low ...
Space & Earth / Earth Sciences
Oct 02, 2011 |
3.8 / 5 (18) |
28
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Asteroid Attack 4 Billion Years Ago May Have Accelerated Life on Earth
(PhysOrg.com) -- The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given ...
Space & Earth / Earth Sciences
May 20, 2009 |
4.5 / 5 (14) |
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Cosmologist Paul Davies explores notion of 'alien' life on Earth
Astrobiologists have often pondered "life as we do not know it" in the context of extraterrestrial life, says Paul Davies, an internationally acclaimed theoretical physicist and cosmologist at Arizona State University. "But," ...
Space & Earth / Space Exploration
Feb 15, 2009 |
4 / 5 (15) |
2
High planetary tilt lowers odds for life?
Highly-tilted worlds would have extreme seasons, subjecting life to alternating periods of scorching and subzero temperatures. This could make the development of all but hardiest, simplest creatures a long ...
Space & Earth / Space Exploration
Feb 06, 2012 |
4.6 / 5 (13) |
14
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How plants drove animals to the land
(PhysOrg.com) -- A new study of ancient oxygen levels presents the first concrete evidence that after aquatic plants evolved and boosted the levels of oxygen aquatic life exploded, leading to fierce competition ...
Other Sciences / Archaeology & Fossils
Sep 30, 2010 |
4.7 / 5 (11) |
0
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Research shows how life might have survived 'snowball Earth'
Global glaciation likely put a chill on life on Earth hundreds of millions of years ago, but new research indicates that simple life in the form of photosynthetic algae could have survived in a narrow body ...
Space & Earth / Earth Sciences
Oct 11, 2011 |
4.8 / 5 (9) |
4
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The hazy history of Titan's air
What rocky moon has a nitrogen-rich atmosphere, Earth-like weather patterns and geology, liquid hydrocarbon seas and a relatively good chance to support life? The answer is Titan, the fascinating moon of Saturn.
Space & Earth / Space Exploration
Oct 13, 2011 |
4.9 / 5 (8) |
18
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Circadian cycle even more important to life than previously suspected: study
Researchers at USC were surprised recently to discover just how much the rising and setting of the sun drives life on Earth – even in unexpected places.
Sep 12, 2011 |
4.6 / 5 (8) |
1
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Astrophysics and extinctions: News about planet-threatening events
Space is a violent place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they'd give off colossal blasts of lethal gamma-rays, X-rays and cosmic rays and it's perfectly reasonable to expect ...
Space & Earth / Space Exploration
Oct 07, 2011 |
4.4 / 5 (8) |
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Star Wars-inspired bacterium provides glimpse into life
(PhysOrg.com) -- A bacterium whose name was inspired by the Star Wars films has provided new clues into the evolution of our own cells and how they came to possess the vital energy-producing units called mitochondria.
Dec 09, 2011 |
5 / 5 (7) |
10
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Organic compounds found in proto-planetary disks
(PhysOrg.com) -- A new study from scientists in the US has reported that organic compounds could be formed in proto-planetary disks, and could have seeded the development of life in our own and other planetary ...
Mar 30, 2012 |
5 / 5 (7) |
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