Remember the comet that smacked Jupiter about 20 times, back in 1994 - when has this happened on Earth before, and when (if ever) will it happen again?

©Unknown

The Comet Hazard school scientists propose that the Tunguska event was due to a fragment of Comet Encke.These scientists also now have the FACT of the fragments of Comet Shoemaker-Levy hitting Jupiter in July of 1994 to illustrate the problem we face. The Comet Hazard scientists also think, as mentioned above, that impacts are a lot more frequent than many people suppose.

So, to sum it up: there are two very different schools that study hazards from space. The Asteroid school says that there have been very few impacts and the problem is solvable, and the Comet school says there is evidence that there have been numerous impacts by comet debris that have had profound effects on human civilizations, and will again, probably very soon.

As you ponder, you might want to visit some of these links:

• The Cosmic Turkey-Shoot
• 
  The Hazard to Civilization from Fireballs and Comets
• 
  Symposium Presentation by Oxford’s Victor Clube

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