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"sequoias" khỗng lồ chĩ có thấy mới tin.
Những cây nầy sống ỡ Miền Tây Hoa Kỳ ..theo zọc vùng núi California
Những cây khỗng lồ có dặc tính là .. càng zà thì càng khõe mạnh. Chúng nó dã sống trên 3,200 năm !!
Da số những cây khỗng lồ nầy dã bị dám zi zân từÂu Châu dến Tân Thế zới trong thế kỹ 19 hạ dễ zùng..
Trong khoãng thời zan chúng nó sinh
sống và bành trướng, chúng nó dã vượt qua bao nhiêu là các trận bão kinh hoàng kũng như hằng trăm vụ cháy rừng.. thế mà chúng vẫn tổn tại.
Những cây cao nhất gồm có tên: Tỗng
..tất cã dều cao hơn 240 ft.
tay vô dịch hiện dang còn sống vàkao
275 ft nhất
of the trees: Stunning photographs of 3,200-year-old giant sequoias as high
as 20-story buildings on Sierra Nevada slopes
Mammoth trees only grow on western slopes of mountain range
running through California and Nevada
By DAILY MAIL
PUBLISHED: 22:14 GMT, 19 November
2012 | UPDATED: 02:33 GMT, 20 November
Immense: The tallest sequoias are so large that it is impossible to look at them in one go
These are some of the world's largest trees, rising
majestically out of the snowy slopes along the Sierra Nevada mountain
Photographer Michael Nichols spent two weeks capturing
images of the 'President' - the world's second-biggest tree which is at
least 3,200 years old in Sequoia National Park, deep in the southern
Sequoias only grow on the western slope of the Sierra
Nevada, a mountain range which runs 400 miles through Nevada and
California. Giant sequoias can reach 247-feet - the height of a
Taking on the president: The world's
second largest tree, a sequoia dubbed the president, on the western slope
of the Sierra Nevada mountain range
Tree of life: Sequoias are particular
to the region and can grow as tall as 20-story buildings
Taming a titan: Photographer Michael
Nichols spent two weeks capturing breathtaking images of the majestic tree
As writer David Quammen, whose article accompanies the
photographer's series in National Geographic, noted: 'It’s not quite the
largest tree on Earth. It’s the second largest.
'Recent research by scientist Steve
Sillett of Humboldt State University and his colleagues has confirmed that the President ranks number two among all big trees that have ever been
measured—and Sillett’s team has measured quite a few.
It doesn’t stand so tall as the
tallest of coast redwoods or of Eucalyptus regnans in Australia, but height
isn’t everything; it’s far more massive than any coast redwood or
Iconic: The President is one of the
major tourist draws at the Giant Sequoia National Monument which covers
much of the Sierra Nevada
Intrepid: A researcher climbs a
sequoia as part of an effort to measure and map the giant trees
'Its dead spire, blasted by lightning,
rises to 247 feet. Its four great limbs, each as big as a sizable tree,
elbow outward from the trunk around halfway up, billowing into a thick
crown like a mushroom cloud flattening against the sky.
'Although its trunk isn’t quite so
bulky as that of the largest giant, the General Sherman, its crown is
fuller than the Sherman’s. The President holds nearly two billion
'Trees grow tall and wide-crowned as a
measure of competition with other trees, racing upward, reaching outward
for sunlight and water. And a tree doesn’t stop getting larger—as a
terrestrial mammal does, or a bird, their size constrained by gravity—once
it’s sexually mature. A tree too is constrained by gravity, but not in the same
way as a condor or a giraffe.
'It doesn’t need to locomote, and it
fortifies its structure by continually adding more wood. Given the constant
imperative of seeking resources from the sky and the soil, and with
sufficient time, a tree can become huge and then keep growing. Giant
sequoias are gigantic because they are very, very old.'
Survivors: Many of the most impressive
trees were destroyed soon after they were discovered by settlers in the
Gorgeous: The majestic plants are
considered one of the greatest natural wonders in the U.S.
The 'rusty red' tree has a footprint
as large as a room in an average home, and is so huge that it is almost
impossible to look at.
Their giant size allows them to
survive disasters which would wipe out many of their woodland competitors -
they are unaffected by storms, resistant to forest fire and can live even
after being struck by lightning.
And the trees never stop growing even
when they are hundreds of feet tall - in fact, their rate of growth has
been found to increase the older they are.
The trunk is constantly widening,
while the upper limbs grow stronger even as the trees age.
Steve Sillett and his helpers proved
this unexpected finding by climbing up the biggest trees and measuring them
more thoroughly than had ever been done before.
The full article is published in the
December issue of National Geographic.
Discovery: The trees were a source of
huge fascination when they were found by settlers
Destruction: The early settlers were
not afraid to cut down the giant trees for timber
Innovation: A settler in 1890 shows
off the path he has cut through the giant sequoia Wawona
The giant sequoia - Sequoiadendron
giganteum - tends to live for many centuries, enabling it to grow larger
than any other species of plant.
The trees are naturally found only in
a small area of the Sierra Nevada in California, nearly all of which is
covered by the Giant Sequoia National Monument.
While they have been successfully
grown in other areas of North America and around the world, nowhere have
they been standing long enough to challenge the size records set by the
Sierra Nevada giants.
They can live for up to 3,500 years,
reaching heights comparable to skyscrapers.
The tallest trees currently standing
include the President, the General Sherman and the General Grant, all above
240ft - but they are far from the tallest known in history.
Soon after the sequoia was discovered
by American settlers in the early 19th century, many of the most impressive
specimens were cut down and exhibited to gawking crowds.
One of the biggest of them all was
known as the Mother of the Forest, which stood in the area from 668 BC and
was discovered by George Gale in 1852.
He stripped the bark of the tree,
leading to its swift demise, while a forest fire in 1908 destroyed what was
Champion: The General Sherman is the tallest tree in the world still
standing, at a staggering 275ft
Stunning: The images of the
magnificent giant sequoias are featured in the December issue of National