Hopes of finding life on the Red Planet have been deflated after NASA announced that Curiosity has yet to detect notable amounts of methane in the Martian atmosphere.
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Successive awakening of soil microbes drives a huge pulse of CO2 following the first rain after a dry summer.
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The federal government tightens regulations on SARS and other deadly viruses, but the changes could hamper research.
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In mutating to evade immune detection, HIV becomes susceptible to detection by different antibodies, suggesting new strategies for vaccination.
Wild animals are getting and spreading the deadly antibiotic-resistant bacteria.
J. Craig Venter plans to develop a machine to find and sequence DNA on Mars, but another genomics mogul, Jonathan Rothberg, may beat him to it.
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