News tagged with trees
Leonardo da Vinci's tree rule may be explained by wind
(PhysOrg.com) -- More than 500 years ago, Leonardo da Vinci observed a particular relationship between the size of a tree’s trunk and the size of its branches. Specifically, the combined cross-sectional ...
Jan 04, 2012 |
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Making a light-harvesting antenna from scratch
(PhysOrg.com) -- Sometimes when people talk about solar energy, they tacitly assume that we're stuck with some version of the silicon solar cell and its technical and cost limitations. Not so.
Nov 29, 2011 |
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Research team finds new explanation for Cambrian explosion
(PhysOrg.com) -- For hundreds of years, researchers from many branches of science have sought to explain the veritable explosion in diversity in animal organisms that started approximately 541 million years ...
Space & Earth / Earth Sciences
Nov 29, 2011 |
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Noted physicist teams with anthropologist to create ancient linguistic tree
(PhysOrg.com) -- With the thousands of languages in the world today, it’s hard to imagine just one of them being spoken by all of the existing humans on Earth. And while there is really no way to prove ...
Oct 12, 2011 |
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Tree resin captures evolution of feathers on dinosaurs and birds
Secrets from the age of the dinosaurs are usually revealed by fossilized bones, but a University of Alberta research team has turned up a treasure trove of Cretaceous feathers trapped in tree resin. The resin ...
Other Sciences / Archaeology & Fossils
Sep 15, 2011 |
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This beetle uses eggs as shields against wasps
(PhysOrg.com) -- New University of Arizona research has discovered that seed beetles from the desert Southwest shelter their broods from attacking parasitic wasps under a stack of dummy eggs.
Sep 14, 2011 |
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'Game-changer' in evolution from S. African bones
An analysis of 2 million-year-old bones found in South Africa offers the most powerful case so far in identifying the transitional figure that came before modern humans - findings some are calling a potential ...
Other Sciences / Archaeology & Fossils
Sep 08, 2011 |
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Research team claims to have found evidence Lake Cheko is impact crater for Tunguska Event
(Phys.org) -- Early on the morning of June 30th, 1908, a huge explosion occurred in a remote part of Siberia near the Podkamennaya Tunguska River. So great was the blast that trees were knocked down in neat ...
Space & Earth / Earth Sciences
May 21, 2012 |
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Forest diversity from Canada to the sub-tropics influenced by family proximity
How species diversity is maintained is a fundamental question in biology. In a new study, a team of Indiana University biologists has shown for the first time that diversity is influenced on a spatial scale ...
May 17, 2012 |
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Study shows trees absorb less carbon than earlier thought; leaf activity drops during summer
(Phys.org) -- On the first day of summer – the longest day of the year – tree leaves are lush and green, luminous in the June sunlight.
May 15, 2012 |
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Handful of heavyweight trees per acre are forest champs
Big trees three or more feet in diameter accounted for nearly half the biomass measured at a Yosemite National Park site, yet represented only one percent of the trees growing there.
May 02, 2012 |
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Scientists find 'man's remotest relative' in lake sludge
After two decades of examining a microscopic algae-eater that lives in a lake in Norway, scientists on Thursday declared it to be one of the world's oldest living organisms and man's remotest relative.
Apr 26, 2012 |
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Study finds that mild winters are detrimental to butterflies
The recent mild winter throughout much of the United States was a cause for celebration for many. However, butterfly aficionados shouldn't be joining in the celebration.
Apr 20, 2012 |
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New study traces the evolutionary history of what mammals eat
The feeding habits of mammals haven't always been what they are today, particularly for omnivores, finds a new study.
Apr 16, 2012 |
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Chimpanzee ground nests offer new insight into our ancestors descent from the trees
The first study into rarely documented ground-nest building by wild chimpanzees offers new clues about the ancient transition of early hominins from sleeping in trees to sleeping on the ground. While most ...
Apr 16, 2012 |
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Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to 6 m; some authors set a minimum of 10 cm trunk diameter (30 cm girth). Woody plants that do not meet these definitions by having multiple stems and/or small size, are called shrubs. Compared with most other plants, trees are long-lived, some reaching several thousand years old and growing to up to 115 m (379 ft) high.
Trees are an important component of the natural landscape because of their prevention of erosion and the provision of a weather-sheltered ecosystem in and under their foliage. Trees also play an important role in producing oxygen and reducing carbon dioxide in the atmosphere, as well as moderating ground temperatures. They are also elements in landscaping and agriculture, both for their aesthetic appeal and their orchard crops (such as apples). Wood from trees is a building material, as well as a primary energy source in many developing countries. Trees also play a role in many of the world's mythologies (see trees in mythology).
For more information about Tree, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
