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Science
LEADING EDGE
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Thursday 21:00-21:30
Leading Edge brings you the latest news from the world of science. Geoff Watts celebrates discoveries as soon as they're being talked about - on the internet, in coffee rooms and bars; often before they're published in journals. And he gets to grips with not just the science, but with the controversies and conversation that surround it.
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LISTEN AGAINListen 30 min
Listen to 13 October
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GEOFF WATTS
Geoff Watts
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Thursday 13 October 2005
Granite rock at a quarry near Vredefort (credit: M Gaylard)
The monster meteorite collision released enough energy to melt solid rock, seen here as the dark bands in a quarry in South Africa 

This week on Leading Edge - a massive meteorite crash, why bigger earthquakes must be expected and the health risks associated with low blood pressure.

South Asian Earthquake


Despite its tragic consequences, the force of the earthquake in Pakistan was less than earthquake experts had been fearing.

Roger Bilham from the University of Colorado says earthquakes ten times more powerful must be expected in the Himalaya region.

Monster Meteorite

Over two thousand million years ago, when only bacteria inhabited the earth, a meteorite the size of the Isle of Wight crashed into the earth.

Roland Pease travels to the site of this ancient global catastrophe.

The Health Risks of Low Blood Pressure

A long term study of elderly people in Sweden has revealed a link between blood pressure and mental health in old age.

Low blood pressure as well as high is a risk factor for dementia.

Genetic Tests

Gene tests can provide invaluable medical information, but they are vulnerable to mis-use.

In a recent US court case, a woman was ordered to have a genetic test for Huntingdon's Disease. The prosecution was hoping to prove that if she had the disease she would be an unfit mother.

Could there be similar rulings in the UK?

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