Wednesday, May 30, 2007

Threatened messengers



NATURE (The Hindu Mgagzine 27 May 2007)
Threatened messengers
The plight of cranes the world over has become a metaphor for vanishing wildlife. S. THEODORE BASKARAN
Photo: John Isaac

Among the oldest on earth: Sandhill cranes in the Bosque del Apache National Wildlife Refuge in the U.S.
What is the colour of snow like? It is like white crane.
Nirvana Sutra
ZEN monk, nature writer and explorer Peter Matthiessen was in India three years ago, to observe the crane phenomenon at Khichan village in Rajasthan, where these graceful migrants — common and demoiselle cranes — gather by the thousands t o feed on the grains strewn by the villagers. This is a community ritual that has been going on for the past 115 years.
Matthiessen travelled on to Gujarat to watch Sarus cranes in their home territory. It was part of his worldwide peregrination to observe all the cranes of the world. The result is a fascinating book The Birds of Heaven: Travels with Cran es (2003) Matthiessen points out that the plight of the cranes all over the world has become a metaphor for vanishing wildlife.
Cranes are long-legged birds with a long neck and bill. Though they look like large storks, they are very different. All cranes nest on ground while storks nest on tree tops. They are one of the oldest of birds on earth; nine million year old fossils of Sandhill cranes have been found in Wyoming. In India you can see five species of cranes: the Common Crane, the Demoiselle, the Siberian, the Black-necked, and Sarus crane. Only the last two are residents and the rest are winter visitors
Myths and legends
All the 15 species of cranes, in both the old and the new world, are subjects of myths and legends. In many cultures, they were once regarded as messengers from heaven, but are now threatened. Their being sensitive to human interference and being slow breeders makes the task of protecting them difficult. War, hunting, habitat destruction, reclaiming wetlands have all taken their toll and many of the crane species are doddering on the brink of extinction.
So in 1973, the International Crane Foundation was formed in Wisconsin to protect these magnificent birds, many of which migrate to warmer climes thousands of kilometres during winter. Mattheissen teams up with five ornithologists and journeys across the world — from New Mexico to Hokkaido in Japan and on to the outback in Australia. In this effort at creating awareness about cranes, he is joined by local conservation enthusiasts, from Mongolian herdsmen to Australian aboriginals. He has recorded this experience of travel, spread over 10 years in this memorable book. The exquisite paintings and drawings of the cranes by bird artist Robert Bateman add to the value of the book.
While writing about the fortunes of Siberian crane, he refers to Richard Meinertzhagen, the notorious ornithologist. Recently The New York Times exposed a scientific fraud this British army officer had committed to gain ornithologic al fame. However, he, along with Salim Ali, first reported the sighting of Siberian crane in Bharatpur in 1937. He has left a note that he and Salim Ali shot one of these cranes for the pot. This species of crane has attracted notice for centuries. Ustad Mansur, the court painter of Jehangir painted this bird. A.O. Hume saw it in Leh in 1854 and described it as “the lily of birds”. As late as 1964, 200 visited Bharatpur. For the last few years, none has been sighted.
There is a distinction between nature writing and writing on wildlife. In the former, the writer responds to nature intuitively in the manner of Thoreau. The writer on wildlife presents scientific findings in a readable manner. Matthiessen combines these two types of writing admirably. He has built up an awesome reputation as a writer through works such as The African Silence, in which he writes about his search for the pigmy elephants and The Snow Leopard in which he gives a gripping account of his trek, in the company of the legendary wildlifer George Schaller, along the Himalayas trying to get a glimpse of the elusive cat. ‘Lyrical’ is the adjective often used to describe his writing.
Virtual reality
The word-pictures he creates have the power of virtual reality. Here is a sample from The Birds of Heaven, in which he describes an incident while looking for the breeding grounds of the Siberian crane. “A steppe fox whisks th rough the blowing grass, a steppe-eagle scoops on a young marmot. The eagle glares at the oncoming vehicles as it tears away red shining shreds. Neatly, then, it eviscerates the rodent, leaving the heavy guts behind as it takes wing, dragging the rest away over the grass”
Various conservation issues also come up for discussion in the book. He writes about the problems in China, about tampering with rivers by building dams and about Lake Baikal, which stores one fifth of the world’s fresh water. There are pen pictures of individuals who work to save the cranes in various parts of the world. That includes Prakash Jain, who renounced everything to work for cranes in Rajasthan and Finley Gilber, an Australian aborigine, who provides information on Brolga crane, a close relative of the Sarus. About his own motivation Mattheissen records, “I care profoundly about cranes and tigers, not only as magnificent and stirring creatures, but as heralds and symbols of all that is being lost”

Sunday, May 27, 2007

Archaeologists unearth America's 'lost' history


Archaeologists unearth America's 'lost' history
Audio: Hear the team discuss this feature as part of SciPod, New Scientist’s weekly podcast.

Michael Lavin raises his hand and shows me a single tobacco seed swirling in a small vial of water. This tiny brown speck he tells me, is a 400-year-old national treasure, one that is helping archaeologists uncover the story of the birth of America.

Lavin is a conservator with the Jamestown Rediscovery Project, which is unearthing the remains of England's first successful colony in the New World. In the past few years, he says, the dig has uncovered more than 1 million artefacts, and each day a few more emerge. As America nears the 400th anniversary of the first settlers disembarking at the site of Jamestown, the archaeological findings are subtly reshaping the story of America's beginnings.

On 13 May 1607, 104 colonists seeking their fortune and a better life disembarked from three ships and stepped ashore onto a spot that would become ground zero in a cultural and ecological exchange that was to transform a continent. It was a shaky start - two weeks later they were attacked by a war party of the Paspahegh tribe and suffered their first casualties. The incident awoke the settlers to the dire need for better defences, and in response they hastily constructed a triangular palisade with bulwarks at each corner, a building they named James Fort.

That fort was discovered just 13 years ago. "Throughout the 20th century most scholars thought that James Fort had been lost to erosion," says senior archaeologist Danny Schmidt. "They assumed there was no need to even look for it." That was until another archaeologist Bill Kelso, following a hunch, initiated a modern search for the building.

In his first season, Kelso discovered the remains of the fort's south wall in Jamestown, and his team has now located all three sides of the triangle and excavated the foundations of several buildings within the perimeter. Luckily, just 15 per cent of the fort has been eroded away by the adjacent river, and archaeologists are uncovering artefacts such as the tobacco seed and skeletons of the early inhabitants (see "Death in the new world"). "It's an incredibly rich site," says senior curator Bly Straub. "Little by little the fort has revealed itself."

During my visit, Schmidt led me to an open pit in the north corner of the triangle, farthest from the shore, where last summer the team discovered the remains of a buried well. "This has been a wonderful find for us," says Schmidt. "We think it's one of James Fort's earliest." Part of the foundation of a building dated to 1617 sits on top of the well, confirming it was dug earlier.

In recent months archaeologists have excavated to the bottom. On the way down, says Schmidt, "we encountered multiple trash layers - predominantly the remains of what the colonists were eating". These table scraps offer a snapshot of survival on the edge, and show how the colonists learned to sustain themselves on food sources such as oysters, turtles and fish - although historical accounts relate that many starved before the colony had a stable food supply.

“Table scraps offer a snapshot of life on the edge, and show how the colonists survived on oysters, turtles and fish”Apart from helping to flesh out the story of America's beginnings, the food remains have also proved to be an exciting new resource for scientists hoping to characterise the ongoing environmental impact of human habitation and industry around Chesapeake Bay.

Juliana Harding, a marine biologist at the nearby Virginia Institute of Marine Science is working on a study comparing oyster shells from the James Fort era with those of modern populations. The differences are striking. Oysters today are smaller and have shorter lifespans because of environmental degradation and over-harvesting. Because the shells in the well can be dated to within 10 years, it is possible to relate growth patterns and isotopic ratios in the shells to corresponding patterns in tree rings on land. This can link the climate record as captured in trees directly to corresponding water temperature and salinity patterns extracted from the shells, potentially providing a baseline that will allow Harding and others to measure the effects of climate change on the region.

"In eating and discarding the oysters, the colonists collected all of these little environmental data recorders and then essentially put them in a time capsule for us to find four hundred years later," says Harding. Similar studies are planned for insect parts that have been collected at the well, along with botanical remains.

Collectively, these studies should provide a portrait of the earliest moments in the so-called "Columbian exchange", when European plant and animal species began to change the landscape. It is for this reason that the tobacco seed, identified at the bottom of the well by archaeobotanist Steve Archer, is so important.

Lavin and his colleagues would like to know if the seed is the native North American species Nicotiana rustica or a southern variety, Nicotiana tabacum, which English colonist John Rolfe is thought to have imported from the West Indies around 1611 and cultivated for its superior flavour. In doing so, Rolfe, better known for marrying the Native American princess Pocahontas, ensured that tobacco became the nascent colony's first economically viable export, safeguarding its future and that of the entire American enterprise. The problem, says Lavin, is that DNA testing may destroy the seed, which is their only well-preserved specimen.

Meanwhile, Schmidt and his colleagues have begun to excavate what appears to be another well. It may be the colony's first, which records suggest was ordered by John Smith - the dominant figure in the history of Jamestown - sometime between 1608 and 1609. The excavation is still metres from the bottom. Schmidt shows me a partial deer skull emerging from the clay. It will shortly be catalogued along with the ever-growing collection that is filling up the project's vault.

"All this data that we thought were gone forever are now coming to light," says Straub. And the story is subtly different story to the one Americans grew up with. Popular accounts tend to take a derogatory view of the Jamestown colony, portraying the colonists as ill-prepared opportunists only interested in finding New World gold and too lazy to save themselves from starvation and disease. The artefacts suggest a different picture, in which adaptation under extreme pressure eventually produced a thriving population and the seeds of a new nation. "This is our birthplace as Americans," says Straub. "This is where we started."

From issue 2603 of New Scientist magazine, 11 May 2007, page 6-7
Death in the new world
Most of the first colonists to arrive in Jamestown did not survive their first year in the New World. Now their stories are being told thanks to the work of forensic anthropologists who have been examining many of the human remains uncovered by the Jamestown Rediscovery Project.

Colonists buried many of their first dead within James Fort itself, abiding by a Virginia Company directive to conceal their casualties from watchful Native Americans keeping track of their numbers. Some of these skeletons can be identified as newly arrived Europeans, not only by their features, but by the relatively low concentrations of the isotope carbon-13 in their bone tissue, a consequence of a European diet based on wheat, barley and rye. Those who stayed long enough to become corn-fed Americans bear a different isotopic signature.

"The kinds of studies I'm doing today with these skeletons you would never have been thought possible 30 years ago," says Doug Owsley of the Smithsonian Institution in Washington DC. "In some cases I think we'll be able to identify individuals." With that, America will know the final resting places of its founders.

One grand experiment
They may have founded a nation, but the first English people to arrive in Jamestown were more like scientist-entrepreneurs than conquerors.

Their arrival was part of a project run by the Virginia Company, a business venture with priorities that ranged from finding a passage to the Orient to jump-starting an English brass industry.

In the early 17th century, England had domestic sources of copper but no zinc-bearing minerals for brass-making. Among the recent finds at Jamestown are scraps of copper that were brought from England both for trade with the Native Americans and also for experimental metallurgy with local ores. Residue in crucibles recovered by archaeologists suggests that the metalwork began almost immediately after the colonists arrived. "They didn't have a good understanding of what they might find," says archaeologist Carter Hudgins, who has studied the metals found at Jamestown. "They were simply looking at the resources, hoping to find something that could be used to manufacture brass."

The experiments were short-lived. The need to survive and defend the colony against attack soon took up all the attention of the 34 colonists who survived the first year. Other ventures, including glass-making, were started and then abandoned. Not until tobacco began to make its way from Jamestown did the colony finally fulfil its core mandate to make money. "The name of the game at Jamestown was making a profit," says Hudgins.

Saturday, May 19, 2007

Climate change: A guide for the perplexed



Giant tree in motion....more..Climate change: A guide for the perplexed
17:00 16 May 2007
NewScientist.com news service
Michael Le Page

Our planet's climate is anything but simple. All kinds of factors influence it, from massive events on the Sun to the growth of microscopic creatures in the oceans, and there are subtle interactions between many of these factors.

Yet despite all the complexities, a firm and ever-growing body of evidence points to a clear picture: the world is warming, this warming is due to human activity increasing levels of greenhouse gases in the atmosphere, and if emissions continue unabated the warming will too, with increasingly serious consequences.

Yes, there are still big uncertainties in some predictions, but these swing both ways. For example, the response of clouds could slow the warming or speed it up.

With so much at stake, it is right that climate science is subjected to the most intense scrutiny. What does not help is for the real issues to be muddied by discredited arguments or wild theories.

So for those who are not sure what to believe, here is our round-up of the 26 most common climate myths and misconceptions.

There is also a guide to assessing the evidence. In the articles we've included lots of links to primary research and major reports for those who want to follow through to the original sources.

• Human CO2 emissions are too tiny to matter

• We can't do anything about climate change

• The 'hockey stick' graph has been proven wrong

• Chaotic systems are not predictable

• We can't trust computer models of climate

• They predicted global cooling in the 1970s

• It's been far warmer in the past, what's the big deal?

• It's too cold where I live - warming will be great

• Global warming is down to the Sun, not humans

• It’s all down to cosmic rays

• CO2 isn't the most important greenhouse gas

• The lower atmosphere is cooling, not warming

• Antarctica is getting cooler, not warmer, disproving global warming

• The oceans are cooling

• The cooling after 1940 shows CO2 does not cause warming

• It was warmer during the Medieval period, with vineyards in England

• We are simply recovering from the Little Ice Age

• Warming will cause an ice age in Europe

• Ice cores show CO2 increases lag behind temperature rises, disproving the link to global warming

• Ice cores show CO2 rising as temperatures fell

• Mars and Pluto are warming too

• Many leading scientists question climate change

• It's all a conspiracy

• Hurricane Katrina was caused by global warming

• Higher CO2 levels will boost plant growth and food production

• Polar bear numbers are increasing

If you would like to comment on this article, visit our blog.

For further reading, see the weblinks below.

Web Links
Climate myths special, New Scientist
Intergovernmental Panel on Climate Change (IPCC)
FAQs, IPCC (pdf)
RealClimate.org
How to talk to a climate skeptic, Grist
Common arguments by climate sceptics, Logical Science
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Friday, May 11, 2007

CHILL WITH SANJEEV KAPOOR'S RECIPES!

Image Source :SanjeevKapoor.com
MIXED FRUIT LASSI

Ingredients Pear, roughly chopped 1 medium Apple, roughly chopped 1 medium Yogurt 2 cupsHoney 2 tablespoonsApricot preserve 2 tablespoons Fresh mint leaves 4Method1. Blend chopped pear and apple in a blender well. Add yogurt, honey and apricot preserve and continue to blend till smooth.2. Add a cup of ice cubes and blend some more.3. Add mint leaves and blend again.4. Serve chilled.

Sanjeev Kapoor's Palate TeasersMaster Chef Sanjeev Kapoor, India's best known chef, is also the celebrity host of TV show Khana Khazana, author of best selling cookbooks, has restaurant franchisees in India and abroad and is the winner of several culinary awards. His mission is evident: to make Indian cuisine the number one cuisine in the world.

CHILL WITH SANJEEV KAPOOR'S RECIPES!

CHILL WITH SANJEEV KAPOOR'S RECIPES!


Photo 1 of 4 Previous | Next










Image Source :SanjeevKapoor.com
MIXED FRUIT LASSI

Ingredients

Pear, roughly chopped 1 medium
Apple, roughly chopped 1 medium
Yogurt 2 cups
Honey 2 tablespoons
Apricot preserve 2 tablespoons
Fresh mint leaves 4

Method

1. Blend chopped pear and apple in a blender well. Add yogurt, honey and apricot preserve and continue to blend till smooth.
2. Add a cup of ice cubes and blend some more.
3. Add mint leaves and blend again.
4. Serve chilled.

Sanjeev Kapoor's Palate Teasers
Master Chef Sanjeev Kapoor, India's best known chef, is also the celebrity host of TV show Khana Khazana, author of best selling cookbooks, has restaurant franchisees in India and abroad and is the winner of several culinary awards. His mission is evident: to make Indian cuisine the number one cuisine in the world.

Wednesday, May 9, 2007

Tunnels interconnected

Spidey and some spider facts...more..to read click here.Underground
Tunnels interconnected

RAMESH SETH

An achievement in urban planning, the underground city is a tourist attraction.



ALL UNDERGROUND: Shops, cinema halls and more.

On a visit to Montreal, Canada, in late November I visited the underground city. It is a vast subterranean city located below the grounds of Christ Church Cathedral. In a predominantly Catholic city, the Anglican Church found itself in a financial crunch. The solution appeared in leasing out the underground. And so this wonderful underground city was born. It is a set of interconnected complexes (both above and below ground) in and around downtown Montreal. It is also known as the indoor city and is the largest underground complex in the world.

New name

In 2004, the downtown segments of the underground city were rebranded and named RÉSO. The name RÉSO is a homonym of the French word réseau, or network (as in a network of tunnels). With over 32 km of tunnels spread over an area of 12 square km it houses more than 1600 shops and boutiques and over 2900 eateries. There are also several cinema halls, shops and commercial complexes. It also has 60 residential complexes.

Some 5,00,000 people use the underground city every day, especially to escape the traffic and/or Montreal's harsh winter or hot summer.

The underground city is promoted as an important tourist attraction by most Montreal travel guidebooks, and as an urban planning achievement it is impressive.