Friday, June 27, 2008
Monday, June 23, 2008
NASA scientist: "We're toast..."
NASA warming scientist: 'This is the last chance'
By SETH BORENSTEIN, AP Science Writer 56 minutes ago
Exactly 20 years after warning America about global warming, a top NASA scientist said the situation has gotten so bad that the world's only hope is drastic action.
James Hansen told Congress on Monday that the world has long passed the "dangerous level" for greenhouse gases in the atmosphere and needs to get back to 1988 levels. He said Earth's atmosphere can only stay this loaded with man-made carbon dioxide for a couple more decades without changes such as mass extinction, ecosystem collapse and dramatic sea level rises.
"We're toast if we don't get on a very different path," Hansen, director of the Goddard Institute of Space Sciences who is sometimes called the godfather of global warming science, told The Associated Press. "This is the last chance."
Hansen brought global warming home to the public in June 1988 during a Washington heat wave, telling a Senate hearing that global warming was already here. To mark the anniversary, he testified before the House Select Committee on Energy Independence and Global Warming where he was called a prophet, and addressed a luncheon at the National Press Club where he was called a hero by former Sen. Tim Wirth, D-Colo., who headed the 1988 hearing.
To cut emissions, Hansen said coal-fired power plants that don't capture carbon dioxide emissions shouldn't be used in the United States after 2025, and should be eliminated in the rest of the world by 2030. That carbon capture technology is still being developed and not yet cost efficient for power plants.
Burning fossil fuels like coal is the chief cause of man-made greenhouse gases. Hansen said the Earth's atmosphere has got to get back to a level of 350 parts of carbon dioxide per million. Last month, it was 10 percent higher: 386.7 parts per million.
Hansen said he'll testify on behalf of British protesters against new coal-fired power plants. Protesters have chained themselves to gates and equipment at sites of several proposed coal plants in England.
"The thing that I think is most important is to block coal-fired power plants," Hansen told the luncheon. "I'm not yet at the point of chaining myself but we somehow have to draw attention to this."
Frank Maisano, a spokesman for many U.S. utilities, including those trying to build new coal plants, said while Hansen has shown foresight as a scientist, his "stop them all approach is very simplistic" and shows that he is beyond his level of expertise.
The year of Hansen's original testimony was the world's hottest year on record. Since then, 14 years have been hotter, according to the National Oceanic and Atmospheric Administration.
Two decades later, Hansen spent his time on the question of whether it's too late to do anything about it. His answer: There's still time to stop the worst, but not much time.
"We see a tipping point occurring right before our eyes," Hansen told the AP before the luncheon. "The Arctic is the first tipping point and it's occurring exactly the way we said it would."
Hansen, echoing work by other scientists, said that in five to 10 years, the Arctic will be free of sea ice in the summer.
Longtime global warming skeptic Sen. James Inhofe, R-Okla., citing a recent poll, said in a statement, "Hansen, (former Vice President) Gore and the media have been trumpeting man-made climate doom since the 1980s. But Americans are not buying it."
But Rep. Ed Markey, D-Mass., committee chairman, said, "Dr. Hansen was right. Twenty years later, we recognize him as a climate prophet."
___
On the Net:
Hansen's speech: http://www.columbia.edu/jeh1/2008/TwentyYearsLater_20080623.pdf
By SETH BORENSTEIN, AP Science Writer 56 minutes ago
Exactly 20 years after warning America about global warming, a top NASA scientist said the situation has gotten so bad that the world's only hope is drastic action.
James Hansen told Congress on Monday that the world has long passed the "dangerous level" for greenhouse gases in the atmosphere and needs to get back to 1988 levels. He said Earth's atmosphere can only stay this loaded with man-made carbon dioxide for a couple more decades without changes such as mass extinction, ecosystem collapse and dramatic sea level rises.
"We're toast if we don't get on a very different path," Hansen, director of the Goddard Institute of Space Sciences who is sometimes called the godfather of global warming science, told The Associated Press. "This is the last chance."
Hansen brought global warming home to the public in June 1988 during a Washington heat wave, telling a Senate hearing that global warming was already here. To mark the anniversary, he testified before the House Select Committee on Energy Independence and Global Warming where he was called a prophet, and addressed a luncheon at the National Press Club where he was called a hero by former Sen. Tim Wirth, D-Colo., who headed the 1988 hearing.
To cut emissions, Hansen said coal-fired power plants that don't capture carbon dioxide emissions shouldn't be used in the United States after 2025, and should be eliminated in the rest of the world by 2030. That carbon capture technology is still being developed and not yet cost efficient for power plants.
Burning fossil fuels like coal is the chief cause of man-made greenhouse gases. Hansen said the Earth's atmosphere has got to get back to a level of 350 parts of carbon dioxide per million. Last month, it was 10 percent higher: 386.7 parts per million.
Hansen said he'll testify on behalf of British protesters against new coal-fired power plants. Protesters have chained themselves to gates and equipment at sites of several proposed coal plants in England.
"The thing that I think is most important is to block coal-fired power plants," Hansen told the luncheon. "I'm not yet at the point of chaining myself but we somehow have to draw attention to this."
Frank Maisano, a spokesman for many U.S. utilities, including those trying to build new coal plants, said while Hansen has shown foresight as a scientist, his "stop them all approach is very simplistic" and shows that he is beyond his level of expertise.
The year of Hansen's original testimony was the world's hottest year on record. Since then, 14 years have been hotter, according to the National Oceanic and Atmospheric Administration.
Two decades later, Hansen spent his time on the question of whether it's too late to do anything about it. His answer: There's still time to stop the worst, but not much time.
"We see a tipping point occurring right before our eyes," Hansen told the AP before the luncheon. "The Arctic is the first tipping point and it's occurring exactly the way we said it would."
Hansen, echoing work by other scientists, said that in five to 10 years, the Arctic will be free of sea ice in the summer.
Longtime global warming skeptic Sen. James Inhofe, R-Okla., citing a recent poll, said in a statement, "Hansen, (former Vice President) Gore and the media have been trumpeting man-made climate doom since the 1980s. But Americans are not buying it."
But Rep. Ed Markey, D-Mass., committee chairman, said, "Dr. Hansen was right. Twenty years later, we recognize him as a climate prophet."
___
On the Net:
Hansen's speech: http://www.columbia.edu/jeh1/2008/TwentyYearsLater_20080623.pdf
Saturday, June 21, 2008
Friday, June 6, 2008
Stem cells apparently cure boy's fatal disease
The treatment uses umbilical and marrow cells to help develop normal skin. Doctors say it may move his genetic disorder 'off the incurable list' for other patients.
By Thomas H. Maugh II
Los Angeles Times Staff Writer
3:17 PM PDT, June 6, 2008
Using stem cells from umbilical cord blood and bone marrow, researchers have apparently cured a fatal genetic disease in a 2-year-old Minneapolis boy, a feat that could open the door for a variety of stem cell treatments.
For the first time in his life, Nate Liao is wearing normal clothes, eating food that has not been pureed and playing with his siblings.
"Nate's quality of life is forever changed," said Dr. John Wagner of the University of Minnesota Medical School, who performed the treatment. "Maybe we can take one more disorder off the incurable list."
The team has subsequently treated Nate's 5-year-old brother Jacob and is preparing to treat 9-month-old Sarah Rose Mooreland of Folsom, Calif., and hopes are high for them as well.
Nate suffers from recessive epidermolysis bullosa, a genetic disease that affects one in every 100,000 children. Such children lack a critical protein called collagen type VII that anchors the skin and lining of the gastrointestinal system to the body.
Their skin is extraordinarily fragile. Tearing and blistering occur with minimal friction, leading to painful wounds and scarring. Solid food produces erosion of the esophagus. Death usually results from malnutrition, infections or aggressive skin cancer.
The only treatment previously has been to keep the children wrapped in bandages to protect the skin as much as possible.
The idea of using circulating stem cells to treat the condition was developed by Dr. Angela M. Christiano of Columbia University Medical Center. This is the first time that cells from bone marrow and cord blood have been used to treat a condition that does not involve blood.
After perfecting the approach in mice, the team treated Nate seven months ago. Nate went first because one of his brothers was a good genetic match. Jacob received cells from a non-familial donor.
Lab tests show that Nate's body is now making collagen type VII, Wagner said at a news conference Tuesday.
More important, his face is plumped up and he has fewer blisters. New skin now covers his right leg, which once had only a translucent purple-and-red coating over his internal tissues and veins. And he is eating Oreos and chicken noodle soup and begging for more.
"I have watched Nate improve every day," said his mother, Theresa Liao. "It has been slow, but I believe we are on the road to him getting better."
The results will be published in a future issue of the New England Journal of Medicine.
thomas.maugh@latimes.com
By Thomas H. Maugh II
Los Angeles Times Staff Writer
3:17 PM PDT, June 6, 2008
Using stem cells from umbilical cord blood and bone marrow, researchers have apparently cured a fatal genetic disease in a 2-year-old Minneapolis boy, a feat that could open the door for a variety of stem cell treatments.
For the first time in his life, Nate Liao is wearing normal clothes, eating food that has not been pureed and playing with his siblings.
"Nate's quality of life is forever changed," said Dr. John Wagner of the University of Minnesota Medical School, who performed the treatment. "Maybe we can take one more disorder off the incurable list."
The team has subsequently treated Nate's 5-year-old brother Jacob and is preparing to treat 9-month-old Sarah Rose Mooreland of Folsom, Calif., and hopes are high for them as well.
Nate suffers from recessive epidermolysis bullosa, a genetic disease that affects one in every 100,000 children. Such children lack a critical protein called collagen type VII that anchors the skin and lining of the gastrointestinal system to the body.
Their skin is extraordinarily fragile. Tearing and blistering occur with minimal friction, leading to painful wounds and scarring. Solid food produces erosion of the esophagus. Death usually results from malnutrition, infections or aggressive skin cancer.
The only treatment previously has been to keep the children wrapped in bandages to protect the skin as much as possible.
The idea of using circulating stem cells to treat the condition was developed by Dr. Angela M. Christiano of Columbia University Medical Center. This is the first time that cells from bone marrow and cord blood have been used to treat a condition that does not involve blood.
After perfecting the approach in mice, the team treated Nate seven months ago. Nate went first because one of his brothers was a good genetic match. Jacob received cells from a non-familial donor.
Lab tests show that Nate's body is now making collagen type VII, Wagner said at a news conference Tuesday.
More important, his face is plumped up and he has fewer blisters. New skin now covers his right leg, which once had only a translucent purple-and-red coating over his internal tissues and veins. And he is eating Oreos and chicken noodle soup and begging for more.
"I have watched Nate improve every day," said his mother, Theresa Liao. "It has been slow, but I believe we are on the road to him getting better."
The results will be published in a future issue of the New England Journal of Medicine.
thomas.maugh@latimes.com
Paintings really can be heard, scientist says
Sept. 7, 2006
Courtesy University College London
and World Science staff
| |
Kandinsky's "Composition VIII, 1923," in the Solomon R. Guggenheim Museum, New York. |
They may really feel they hear paintings, for instance. But the condition doesn’t occur only with sound and sight: the most bizarre forms of it have been reported.
A study in the Aug. 22 issue of the research journal Consciousness and Cognition, for example, found that some people link time and space. One described December as a red area located at arm’s length to the left of their body.
Ward detailed findings of his own new studies on synaesthesia at a talk at the British Association for the Advancement of Science Festival of Science in Norwich, U.K. this week. His work focused on the sound-color-linkage of which Kandinsky spoke.
His found that most of us tend to agree with synaesthetes on which images match which sounds, and that we prefer them combined rather than alone.
Kandinsky, who lived from 1866 to 1944, “wanted to make visual art more like music—more abstract,” Ward said. “He also hoped that his paintings would be ‘heard’ by his audiences. This seems more achievable now that we have found such a strong link between vision and hearing.”
“Although information from the world enters our heads via different sensory organs—the eyes and ears in this instance—once they are in the brain they are intimately connected with each other. Impressively, they are connected in non-random ways, so that some combinations of sound and vision go together better than others.”
In experiments, Ward said he asked six synaesthetes to draw and describe their visual experiences of music from the New London Orchestra. Six non-synaesthetes were asked to do the same. Also, an animator created films combining the music and drawn images. These were shown to visitors at London’s Science Museum.
Furthermore, 100 images were presented to over 200 people. They were asked to choose the image that best fit the music. They consistently chose images drawn by synaesthetes over others, Ward reported.
This shows, he said, that while non-synaesthetes can’t hear a painting or see music literally, they do sense the crossover and tend to choose the “correct” image. “All of us have links between our hearing and vision—even if we don’t really realise it,” Ward said.
That’s not to say that synaesthetes hear precisely the same sounds in “listening” to a Kandinsky painting.
Describing the artist’s “Composition VIII, 1923,” Ward reported, one synaesthete said: “The jumbled mass of lines gave various tones, which changed as my eyes travelled round the picture. When looking at the large multicoloured powerful circle at upper left, I get a pure tone which can be too much, so to relieve my mind of this I travel back to the cacophony of jumbled lines and shapes. This painting therefore is a good balance of contrasting noise—pure tones and cacophony—which was a delight to see.”
Another described it as follows: “There is a huge splurge of sound left-hand top—booming and vulgar! Below it is a mousy little meee sound which then translates into ‘oh’s and ‘ah’s and pops at the various circles. The lines are sharp and are moving to the right with the sound of steel—like blades scraping against one another. The triangle and boomerang shape are surprised and pop up laughing with a ‘whooo’.”
The next stage of the research will use brain scans to monitor the brains of synaesthetes when Kandinsky triggers sound or when sound triggers a vision, Ward said.
Subscribe to:
Posts (Atom)