Clues to Antarctica space blast

I think is the was an explosion that big over antartica, the reults would have been a lot more devistating to the entire planet!

I think is the was an explosion that big over antartica, the reults would have been a lot more devistating to the entire planet! What exactly do you base this conclusion on? Air blasts are fairly common. US military satellites have been observing them for decades. Many are the size of a moderate nuclear explosion and yet go totally unnoticed on the ground. As the article points out the explosion would have been similar in size to that in Tunguska in 1908. Would you like to point out the global devastation that event caused please? Apart from lighter skies for a few nights in large parts of Eur... [More]

article- "Airbursts on the scale of the Tunguska event are thought to occur every 500-1,000 years on Earth. This figure is based on computer modelling by Dr Bland and his colleagues." its a good thing the last supposed airburst was over a vast unpopulated area then. also we have around 400+ years to go before we should worry, right? also note the good doctors name happens to be 'Bland.' generic name of the day goes to the man in the gray lab coat with the Ben Stein voice.

when it could happen?????????????

At any time