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Joe Palca

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ARI SHAPIRO, HOST:

A giant dust storm on Mars is threatening to end the mission of a NASA rover. The rover called Opportunity depends on solar panels to charge its batteries. Right now, the storm has practically blotted out the sun. NPR's Joe Palca has more.

For the first time, scientists say they have clear evidence that the chemical building blocks of life exist on Mars.

What they can't say yet is whether there is, or ever was, life on the Red Planet.

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STEVE INSKEEP, HOST:

Each year, malaria kills about half a million people around the world. Health officials say a fast, cheap, accurate way to test for people infected with the malaria parasite would be extremely helpful in combating the disease. Now some engineers in California say they've invented a device they hope someday will do just that.

The device takes advantage of the fact that the malaria parasite produces tiny crystals inside infected red blood cells. These crystals have a magnetic property. Put a magnet next to a drop of infected blood, and the crystals move toward the magnet.

Scientists have new evidence that there are plumes of water erupting from the surface of Jupiter's icy moon Europa — plumes that could, maybe, possibly contain signs of life.

The evidence comes from data collected by the now-defunct Galileo spacecraft. Although the data has been available since it was collected in 1997, it's only now that an analysis confirms the existence of water plumes.

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