Article one:"Researchers at the Max Planck Institute for Plasma Physics and the Humboldt University, both in Berlin, have used underwater electrical discharges to generate luminous plasma clouds resembling ball lightning that last for nearly half a second and are up to 20 centimetres across.
They hope that these artificial entities will help them understand the bizarre phenomenon and perhaps even provide insights into the hot plasmas needed for fusion power plants.
You can watch a super-slow-motion video of the ball lightning here (3.7MB AVI)."
Article two:
"What happened to Titan's craters? NASA's Cassini mission should have seen hundreds of impact craters on Saturn's giant moon, but so far it has only spotted a handful.
The latest clues in the mystery of the missing craters suggest a conspiracy between volcanoes, rain and settling soot - perhaps aided by an eggshell-thin crust.
Cassini has aimed its radar at Titan five times, mapping five narrow strips of terrain. In a paper published in Nature, the radar team analyse the second strip in detail."
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