Last Updated: Sunday, October 9, 2011, 16:43
Gamma-ray bursts, massive explosions on the other side of the galaxy, could end life on Earth, say planetary scientists.
Last Updated: Friday, October 7, 2011, 12:20
A spacecraft orbiting Venus has discovered an ozone layer high in the planet’s atmosphere.
Last Updated: Wednesday, October 27, 2010, 15:41
An asteroid splashdown in one of the Earth`s oceans could trigger a destructive chemical cycle.
Last Updated: Tuesday, October 26, 2010, 13:29
If a medium-sized asteroid were to land in the oceans, the Earth`s ozone layer could be at risk too.
Last Updated: Thursday, October 14, 2010, 17:45
Water vapour and sea salt thrown up by asteroid impact could damage the protective ozone layer.
Last Updated: Tuesday, September 21, 2010, 14:05
According to UN scientists ozone layer could be back to full strength by middle of this century.
Last Updated: Friday, September 17, 2010, 09:21
The protective ozone layer in the earth`s upper atmosphere should largely be restored by mid century.
Last Updated: Friday, August 28, 2009, 10:33
Laughing gas or Nitrous Oxide (N2O) is the most abundant ozone-depleting substance in the 21st century as the emissions of CFC, another green house gas, has come down, a new study suggests.
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