[naturenews] from [nature.com]
[naturenews]
Published online 29 January 2010 | Nature | doi:10.1038/463600a
News
Mars rover Spirit (2003–10)
NASA commits robot explorer to her final resting place.
Katharine Sanderson
Spirit was born in 2003 to mission manager Mark Adler and Steven Squyres, a planetary scientist at Cornell University in Ithaca, New York. She was delivered at NASA's Jet Propulsion Laboratory in Pasadena, California, and it was there that she spent her formative months being schooled in rovering. Later, she moved to a finishing school at the Kennedy Space Center in Florida. Her graduation was epic: a 490-million-kilometre flight to Mars, where she and her twin Opportunity would pursue their destinies as roving geologists.
Her adult life began in January 2004, with an airbag-cushioned landing in the Gusev crater in January 2004 on the opposite side of the planet from her twin. The aim: to find evidence of water, and of environments that might once have been conducive to life.
With three spectrometers, an abrasion tool and panoramic and close-up cameras on board, the young rover quickly gained confidence. Her geological mettle was proved when just 32 days into her Martian voyage she picked out a rock, named Adirondack, swept it clean and drilled into it, confirming that it was the volcanic rock basalt.
Before long, she got her driving licence. She began controlling her own movements using her hazard-avoidance camera, rather than only following instructions from her large team of Earth-based mentors.
She went on to use her wire brush to uncover different-coloured layers in a rock in the Gusev crater that suggested multiple exposures to water — leading one Earthly scientist to declare the find a "miracle".
By the time the initial mission of 90 sols (Martian days) was complete, Spirit had driven 600 metres, but that was only the beginning. Well beyond her appointed days, she continued to gather valuable scientific information about Mars, sometimes with unexpected help, often against all odds. Dust was a constant nuisance, covering her life-giving solar panels. But in 2005, a dust devil happened to sweep the panels clean, giving her an energy boost.
In March 2006, Spirit's right front wheel stopped working. But she struggled on over soft ground towards McCool Hill, in the Columbia Hills region, dragging the broken wheel — and had another lucky stroke. The broken wheel churned up the soft soil, exposing dirt that Spirit analysed to show was unexpectedly rich in silicates, which need water to form.
Each winter, Spirit had to bed down on a north-facing slope to make the most of the low winter sun to charge her solar panels. A favourite spot was Home Plate, a sunny plateau that provided her with not only a winter home, but also a place to explore. While wintering here in 2006, Spirit discovered a pair of iron-rich meteorites using her thermal-emission spectrometer. That same winter, in October, Spirit reached a milestone 1,000 sols on Mars and survived a technical hitch that support teams on Earth worried might be a Martian version of the millennium bug.
News reports back on Earth suggested that the rover's days were numbered, yet she constantly confounded any prophets of doom. But in late January 2009, Spirit's lucidity deteriorated. She had trouble moving around, couldn't identify the position of the Sun correctly, and her family on Earth had trouble understanding her. Cosmic rays were blamed.
In April 2009, the ailing rover chose to reboot her computer twice. Worried controllers on Earth encouraged Spirit to press on, but more trouble lay ahead.
In a location called Troy, Spirit unwittingly crunched through the surface of a sandpit, and became entrapped. In November 2009 engineers on Earth, who had been testing a replica rover in a sand pit, tried to help her get out of her sticky situation — but to no avail. Even though the rover, by now suffering another broken wheel, did manage to climb up a few centimetres, Spirit finally gave up trying on 26 January 2010.
Her odometer read 7,730 metres. She will continue to radio back observations — of the atmosphere, of the planet's rotation — from her stationary position for as long as possible.
Spirit leaves behind her sister Opportunity — who is still active and is on her way to peer into a crater called Concepcion — and an extended family at NASA.
[naturenews]
Published online 29 January 2010 | Nature | doi:10.1038/news.2010.44
News
Ten billion dollars pledged for 'decade of vaccines'
Gates Foundation cash could save nearly nine million children.
Heidi Ledford
{{The Gates Foundation hopes to boost vaccine development and distribution.}
Bananastock}
The Bill & Melinda Gates Foundation today promised to put $10 billion towards a 10-year effort to boost vaccination against infectious disease in developing countries. It is the foundation's largest commitment yet to the discovery, development and distribution of vaccines.
The announcement, made at the World Economic Forum in Davos, Switzerland, comes as the GAVI alliance — another vaccine initiative supported in part by the Gates Foundation — celebrates its ten-year anniversary. GAVI has been credited with distributing vaccines to 257 million children and preventing 5 million deaths. The alliance has also been instrumental in bringing the world vaccination rate against hepatitis B up from about 15% in 1999 to nearly 70%, says Adel Mahmoud, a global health researcher at Princeton University in New Jersey. "This is very serious stuff," says Mahmoud. "GAVI's success with hepatitis B was tremendous."
According to a model developed at the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland, the new $10 billion commitment could save up to 7.6 million children by targeting viruses that cause diarrhoea and pneumonia. If the RTS,S vaccine against malaria, currently in clinical trials (see 'Malaria vaccine enters phase III clinical trials'), is introduced by 2014, 1.1 million other children could be saved.
The Gates Foundation has already dedicated $4.5 billion to vaccines but says that much more would be needed to immunize 90% of the world's children. "Part of this is a call to action," says Joe Cerrell, director of the foundation's Europe office in London. "We are trying to make sure that governments and others are doing all that they can to support more immunization coverage."
Improving vaccination against rotavirus — the leading cause of severe diarrhoea in infants and children — is one area that could benefit, notes Mahmoud. The rotavirus vaccine was shown to reduce disease by over 60% when introduced in South Africa and Malawi1. But the vaccines, first licensed in 2006, are still relatively new. "The general feeling is: who is going to champion their introduction in the developing world?" says Mahmoud. "To this date there is no clear-cut plan. So if the Gates Foundation comes up with something very robust in this area, it will really make a difference."
References
1. Madhi, S. A. et al. N. Engl. J. Med. 362, 289– 298 (2010).
[naturenews]
Published online 29 January 2010 | Nature | doi:10.1038/463600a
News
Mars rover Spirit (2003–10)
NASA commits robot explorer to her final resting place.
Katharine Sanderson
Spirit was born in 2003 to mission manager Mark Adler and Steven Squyres, a planetary scientist at Cornell University in Ithaca, New York. She was delivered at NASA's Jet Propulsion Laboratory in Pasadena, California, and it was there that she spent her formative months being schooled in rovering. Later, she moved to a finishing school at the Kennedy Space Center in Florida. Her graduation was epic: a 490-million-kilometre flight to Mars, where she and her twin Opportunity would pursue their destinies as roving geologists.
Her adult life began in January 2004, with an airbag-cushioned landing in the Gusev crater in January 2004 on the opposite side of the planet from her twin. The aim: to find evidence of water, and of environments that might once have been conducive to life.
With three spectrometers, an abrasion tool and panoramic and close-up cameras on board, the young rover quickly gained confidence. Her geological mettle was proved when just 32 days into her Martian voyage she picked out a rock, named Adirondack, swept it clean and drilled into it, confirming that it was the volcanic rock basalt.
Before long, she got her driving licence. She began controlling her own movements using her hazard-avoidance camera, rather than only following instructions from her large team of Earth-based mentors.
She went on to use her wire brush to uncover different-coloured layers in a rock in the Gusev crater that suggested multiple exposures to water — leading one Earthly scientist to declare the find a "miracle".
By the time the initial mission of 90 sols (Martian days) was complete, Spirit had driven 600 metres, but that was only the beginning. Well beyond her appointed days, she continued to gather valuable scientific information about Mars, sometimes with unexpected help, often against all odds. Dust was a constant nuisance, covering her life-giving solar panels. But in 2005, a dust devil happened to sweep the panels clean, giving her an energy boost.
In March 2006, Spirit's right front wheel stopped working. But she struggled on over soft ground towards McCool Hill, in the Columbia Hills region, dragging the broken wheel — and had another lucky stroke. The broken wheel churned up the soft soil, exposing dirt that Spirit analysed to show was unexpectedly rich in silicates, which need water to form.
Each winter, Spirit had to bed down on a north-facing slope to make the most of the low winter sun to charge her solar panels. A favourite spot was Home Plate, a sunny plateau that provided her with not only a winter home, but also a place to explore. While wintering here in 2006, Spirit discovered a pair of iron-rich meteorites using her thermal-emission spectrometer. That same winter, in October, Spirit reached a milestone 1,000 sols on Mars and survived a technical hitch that support teams on Earth worried might be a Martian version of the millennium bug.
News reports back on Earth suggested that the rover's days were numbered, yet she constantly confounded any prophets of doom. But in late January 2009, Spirit's lucidity deteriorated. She had trouble moving around, couldn't identify the position of the Sun correctly, and her family on Earth had trouble understanding her. Cosmic rays were blamed.
In April 2009, the ailing rover chose to reboot her computer twice. Worried controllers on Earth encouraged Spirit to press on, but more trouble lay ahead.
In a location called Troy, Spirit unwittingly crunched through the surface of a sandpit, and became entrapped. In November 2009 engineers on Earth, who had been testing a replica rover in a sand pit, tried to help her get out of her sticky situation — but to no avail. Even though the rover, by now suffering another broken wheel, did manage to climb up a few centimetres, Spirit finally gave up trying on 26 January 2010.
Her odometer read 7,730 metres. She will continue to radio back observations — of the atmosphere, of the planet's rotation — from her stationary position for as long as possible.
Spirit leaves behind her sister Opportunity — who is still active and is on her way to peer into a crater called Concepcion — and an extended family at NASA.
[naturenews]
Published online 29 January 2010 | Nature | doi:10.1038/news.2010.44
News
Ten billion dollars pledged for 'decade of vaccines'
Gates Foundation cash could save nearly nine million children.
Heidi Ledford
{{The Gates Foundation hopes to boost vaccine development and distribution.}
Bananastock}
The Bill & Melinda Gates Foundation today promised to put $10 billion towards a 10-year effort to boost vaccination against infectious disease in developing countries. It is the foundation's largest commitment yet to the discovery, development and distribution of vaccines.
The announcement, made at the World Economic Forum in Davos, Switzerland, comes as the GAVI alliance — another vaccine initiative supported in part by the Gates Foundation — celebrates its ten-year anniversary. GAVI has been credited with distributing vaccines to 257 million children and preventing 5 million deaths. The alliance has also been instrumental in bringing the world vaccination rate against hepatitis B up from about 15% in 1999 to nearly 70%, says Adel Mahmoud, a global health researcher at Princeton University in New Jersey. "This is very serious stuff," says Mahmoud. "GAVI's success with hepatitis B was tremendous."
According to a model developed at the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland, the new $10 billion commitment could save up to 7.6 million children by targeting viruses that cause diarrhoea and pneumonia. If the RTS,S vaccine against malaria, currently in clinical trials (see 'Malaria vaccine enters phase III clinical trials'), is introduced by 2014, 1.1 million other children could be saved.
The Gates Foundation has already dedicated $4.5 billion to vaccines but says that much more would be needed to immunize 90% of the world's children. "Part of this is a call to action," says Joe Cerrell, director of the foundation's Europe office in London. "We are trying to make sure that governments and others are doing all that they can to support more immunization coverage."
Improving vaccination against rotavirus — the leading cause of severe diarrhoea in infants and children — is one area that could benefit, notes Mahmoud. The rotavirus vaccine was shown to reduce disease by over 60% when introduced in South Africa and Malawi1. But the vaccines, first licensed in 2006, are still relatively new. "The general feeling is: who is going to champion their introduction in the developing world?" says Mahmoud. "To this date there is no clear-cut plan. So if the Gates Foundation comes up with something very robust in this area, it will really make a difference."
References
1. Madhi, S. A. et al. N. Engl. J. Med. 362, 289– 298 (2010).