Thursday, 9 February, 2012

In just a moment, our brains can go from calm, deliberate and focused, to alert, agitated and aroused. New neural networks get activated during the transition. Now a study of the fight-or flight-response fingers a common hormone in triggering the brainwide changes.

Amphibians are disappearing faster than any other animals. A new study looks at the effects of changes in climate, land use and disease. The picture isn’t pretty, but looking at three threats at once shows the true danger facing frogs, toads, salamanders and their relatives.

The green revolution fed billions, but population keeps rising, water is short and the climate is changing. How will Africans feed themselves despite poor soil and widespread poverty? Could small projects that fit the environment and culture make farmers an engine of prosperity and a big source of food?

Plain-tailed wrens in the Andean cloud forest sing a complex, two-part song, where timing is everything. New research shows that both parties keep a memory of the full song in their brain, even though they only sing half of it.

If scientists agree that the globe is warming, aren’t hot, dry spells more evidence of warming? Yes, but. The Texas heat wave shows how weather blends climate change and natural variation. In looking for the fingerprints of global warming, we may have to separate drought from heat.

Bacteria can help or harm their hosts. Now we hear how one genus of bacteria can multiply fly reproduction. In this symbiosis, both parties benefit. This bacterium also alters insect immunity, and could lead to new tactics for killing horrific parasites.

When hospitals run out of anesthetics, antibiotics and cancer drugs, should we blame or thank the “gray-market”?

Seismic study shows crust thinning as continent divides, giving another view of our restless planet, showing tectonic movement in action, and highlighting a major real-estate investment opportunity.

Synopsis: Each year, as influenza season approaches, medical authorities must scramble to predict which strains of flu will be most important, and then to grow enough vaccine to inoculate the population. Why does this take so much time, and what are some alternative strategies that might speed the process? Find the article: Flu vaccine shortage [...]

A Soyuz crash earlier this year, and the retirement of the space shuttle, imperiled our access to orbit. What is the American plan to return to space? Can other countries or private companies fill the gap?