News tagged with trees
'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 |
4.8 / 5 (25) |
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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 |
4.5 / 5 (25) |
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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 |
4.6 / 5 (24) |
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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 |
4.8 / 5 (20) |
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How hot did Earth get in the past? Scientists uncover new information
The question seems simple enough: What happens to the Earth's temperature when atmospheric carbon dioxide levels increase? The answer is elusive. However, clues are hidden in the fossil record. A new study ...
Space & Earth / Earth Sciences
Jul 05, 2011 |
5 / 5 (18) |
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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 |
5 / 5 (15) |
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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 |
4.8 / 5 (15) |
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Uncovering Da Vinci's rule of the trees
As trees shed their foliage this fall, they reveal a mysterious, nearly universal growth pattern first observed by Leonardo da Vinci 500 years ago: a simple yet startling relationship that always holds between ...
Nov 30, 2011 |
4.7 / 5 (15) |
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13 year old researcher finds tree inspired solar collection more efficient
(PhysOrg.com) -- Aidan Dwyer, a 13 year old Junior High School student from New York state, noticed that the phyllotaxy of the leaves on trees he was observing while hiking through the Catskill Mountains, ...
Technology / Energy & Green Tech
Aug 22, 2011 |
3.3 / 5 (19) |
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'Snakes' seen in human cells
(PhysOrg.com) -- Curious snake-like forms have been spotted in cells from many different species across the evolutionary tree. Now Oxford scientists have shown they exist in human cells as well.
Oct 03, 2011 |
4.4 / 5 (14) |
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Future forests may soak up more carbon dioxide than previously believed
North American forests appear to have a greater capacity to soak up heat-trapping carbon dioxide gas than researchers had previously anticipated.
Oct 13, 2011 |
4.5 / 5 (12) |
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Lockheed Martin develops maple-seed-like drone
The seeds that drop from maple trees each fall, whirring softly to the ground like silent one-winged helicopters, are the inspiration for a new kind of flying machine that could be useful for military information-gathering.
Aug 15, 2011 |
4.3 / 5 (12) |
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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 |
4.6 / 5 (11) |
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'Solar trees' sprout up in California county's parking lots
The frustrating search for a shady spot to park is about to get easier. But the new trees being planted at nine big parking lots in the San Jose, Calif., area aren't leafy green saplings, they're big silver specimens with ...
Technology / Energy & Green Tech
Aug 28, 2011 |
4.5 / 5 (11) |
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Famed fossil isn't a bird after all, analysis says
(AP) -- One of the world's most famous fossil creatures, widely considered the earliest known bird, is getting a rude present on the 150th birthday of its discovery: A new analysis suggests it isn't a bird ...
Other Sciences / Archaeology & Fossils
Jul 27, 2011 |
4.7 / 5 (10) |
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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.
