article in Nature by Philip Ball.
Twin beams of gamma rays are thought to burst from the supernovae of giant stars. Click here to see the animation.
The explosion of a star in our cosmic neighbourhood may not sound like good news for life on Earth. But a team of US researchers says that just such a catastrophe could have showered our planet with fertilizer that helped plants to colonize the land about 440 million years ago
a previous Gamma-ray burst post
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