Archive: 30/07/2007

Learning to evolve: With a little help from my ancestors

Learning to fly is easy, if you are a bird. But why is it that birds learn so easily how to fly" It is well known that birds learn through practice, and that they gradually refine their innate ability into a finely tuned ...

dateJul 30, 2007 in
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Mass extinctions and the marine record

Mass extinctions have long captured the imagination of scientists and non-scientists alike. A new volume published by the Geological Society of America includes some of the best evidence of the relationship between major ...

dateJul 30, 2007 in Earth Sciences
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Researchers find pathway that controls cell size and division

Organisms precisely regulate cell size to ensure that daughter cells have sufficient cellular material to thrive or to create specific cell types: a tiny sperm versus a gargantuan egg for example. In single-celled organisms ...

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Trials begin for 'essential' new TB vaccine

Clinical trials are underway with the first new vaccine against TB in over 80 years. If successful, the tests will have major implications for TB control and could lead to the development of a new vaccine ready to use within ...

dateJul 30, 2007 in Medications
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Fruit bats discovered to have menstrual cycles

They say their findings – published in this month's issue of key journal Biology of Reproduction - could lead to bats being studied by researchers trying to understand human menstrual problems and other reproductive disorders.

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Wider buffers are better

Excess nitrogen caused by fertilizers, animal waste, leaf litter, sewer lines, and highways is responsible for contaminating groundwater. It can also cause human health risks when found in drinking water and oxygen depleted ...

dateJul 30, 2007 in Environment
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