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Theodoric · 12-05-2004, 23:44

It's always a good thing to lob Fermi's paradox into any any discussion of UFOs. Basically this says that if there are space travelling aliens, why haven't they colonised the earth by now? The arithmetic is quite simple. The diameter of our galaxy is about 100,000 light years. Assuming that their ships are capable of travelling at 1% of light speed, then hopping from solar system to solar system and stopping of at each one to build up an industrial base, it should only take them about 10 million years to colonise the galaxy. The universe is about 13.5 billion years old, which is much longer than 10 million years, so these hypothetical aliens have had plenty of time.

12-05-2004, 23:44	#33
Theodoric Inactive Join Date: Jun 2003 Location: London Posts: 2,974	Re: UFO's It's always a good thing to lob Fermi's paradox into any any discussion of UFOs. Basically this says that if there are space travelling aliens, why haven't they colonised the earth by now? The arithmetic is quite simple. The diameter of our galaxy is about 100,000 light years. Assuming that their ships are capable of travelling at 1% of light speed, then hopping from solar system to solar system and stopping of at each one to build up an industrial base, it should only take them about 10 million years to colonise the galaxy. The universe is about 13.5 billion years old, which is much longer than 10 million years, so these hypothetical aliens have had plenty of time.