Will We Ever Send Self-Replicating Probes into Space?

Gold Barz · 2005-07-30T01:44:46+00:00

Do you guys consider this a possibility? or maybe even probability that we will eventually send out self-replicating probes out into space?

Thread 'I need a concave mirror with a focal length of 150 feet'

I need to cut down a 3 year old dead tree from top down so tree causes no damage with small pieces falling. I need a mirror with a focal length of 150 ft. 12" diameter to 36" diameter will work good but I can't think of any easy way to build it. Nothing like this for sale on Ebay. I have a 30" Fresnel lens that I use to burn stumps it works great. Tree service wants $2000.

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Thread 'I need a concave mirror with a focal length of 150 feet'

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