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Laser beams help take the twinkle out of starlight

If you have ever peered down a highway on a sunny day, you have probably seen the rising, wavelike ripples of heated air that distort the appearance of objects near the horizon. Similar disturbances in the atmosphere above us make stars twinkle as their light is distorted on the way down to Earth.

Although twinkling stars inspired a well-known nursery rhyme, the effect hampers astronomers’ attempts to study the heavens. Scientists at Lawrence Livermore National Laboratory are now build

Rats depleted of salt become sensitized to amphetamine, show unusual growth of brain cells

Laboratory rats that have been repeatedly depleted of salt become sensitized to amphetamine, exhibiting an exaggerated hyperactive response to the drug and an unusual pattern of neuronal growth in a part of their brains, neuroscientists have found.

The researchers, headed by University of Washington psychologist Ilene Bernstein, discovered that nerve cells in the nucleus accumbens of sensitized rats have more branches and were 30 percent to 35 percent longer than normal. The nucleus accumbe

Advance Warning of Storms and Cyclones with New Technique

The catastrophic flooding in Jakarta in February this year could have been predicted nearly 3 weeks in advance with a new technique being developed by Dr Matt Wheeler and colleagues at the Bureau of Meteorology Research Centre in Australia.

The flooding was caused by large waves of air and clouds, so called Madden-Julian Oscillations (MJOs). Using satellite data Dr Wheeler and co-workers are able to predict the occurrence of MJOs, which take about one month to move across the Indian basin a

Surviving the Third Millennium: Sustainable Resource Management

The use of key resources such as forests, fisheries and energy is likely to be unsustainable and threaten the ability of SE Asia to build an environmentally and economically stable future in the face of global change, say a group of international scientists meeting in Bali this week.

In the 1980s the rates of deforestation in Southeast Asia ranged between 60,000 hectare per year in Cambodia and 600,000 hectare per year in Indonesia. Twenty years later it became uncontrollable with larger ran

New research confirms increased greening

Greening seems to have increased during the 1980s and 1990s in the northern hemisphere from the arctic regions down to the 35th parallel of latitude (roughly southern Europe). This has been shown by measurements from space satellites. Some observers, however, have doubted the reliability of these measurements. In the latest issue of Science, a research team from the Institute for Climatic Impacts Research in Potsdam, the Max Planck Institute for Biogeochemistry in Jena, and Lund University presents n

Protective Storm in Space – a new explanation for the death of the dinosaurs

A shower of matter from space millions of years ago could have led to drastic changes in the Earth’s climate, followed by the extinction of life on a massive scale, which also killed off the dinosaurs. This at least is a theory put forward by scientists from the University of Bonn. Normally, the solar wind acts as a shield against showers of cosmic particles, which prevents too many energy-rich particles from raining down on our atmosphere. Since 1997 scientists from Bonn, funded by the German Resea

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