Barbara Maria Yerxa

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Who, What, Why: How does a snake eat a crocodile?

<b>Onlookers at a lake in Queensland watched an olive python kill and swallow a 1m (3.2ft) crocodile. What happens next, asks Tom Geoghegan.</b><p>Pythons in this area usually eat smaller animals - rats are their favourite. Crocodiles represent a more unusual and riskier choice but with greater returns - it …

'Tunnels' and 'spheres' in meteorite revive debate over life on Mars

The discovery of tiny carbon-rich balls and tunnels inside a Martian meteorite has once again raised the possibility that the Red Planet was teeming with primitive life millions of years ago.<p>The meteorite, which fell to Earth during the Stone Age, contains microscopic burrows and spheres that …

Jungle Fever: The Exotic Disease Detectives

<b>When a patient goes to the doctor, most expect to come out with a diagnosis. But what if your disease is a mystery? Then it's time to call in the exotic disease detectives.</b><p>"I travelled to Peru last summer and about a month afterwards noticed what looked like a large boil," says Bob Gilbert, who …

Secret second code found hiding within human DNA

Scientists have long believed that DNA tells the cells how to make proteins. But the discovery of a new, second DNA code overnight suggests the body speaks two different languages.<p>The findings in the journal <i>Science</i> may have big implications for how medical experts use the genomes of patients to …