Originally posted by Ivan Seeking
The question is, what are we looking for? If warp drive takes us another million years or so to develop, then the question of what to look for now in an alien race becomes highly problematic...unless we by chance are monitoring for the proper warp drive signiture.
I wonder how long we will use RF. Over so much time as millions of years, could RF be like a flash in pan for technology?
Hmmm, a
really brief (and significantly inaccurate, no doubt) summary of the history of technologies used by homo sap. for long distance communication:
- 'runners': >100,000 years (pure guess)
- smoke signals: who knows? say ~50,000 years
- horses+riders: ~10,000 years
- carrier pigeon: ~5,000 years??
- various (other) line-of-sight visual (flashy mirrors, beacon fires, flags, ...): ~5,000 years (say)
- all other EM-based methods, telegraph/phone/etc: <200 years
To what extent are we still using pre-RF technologies for long distance communication? Not much.
A similar sketch of long distance bandwidth vs time might imply that RF will be used, to a significant extent, only as long as there aren't better means readily available (and the trend is already well under way, with optical fibres and IR lasers, and that took <50 years!)
What would Archimedes or Newton make of the latest Nokia mobile phone? How to do a 5,000-fold extrapolation of this?
31 November, 2342: Nokia today released its much hyped 546310i phone. Weighing 2 picograms, this selectron-powered unit modulates the relict neutrino flow using a protocol which traces its ancestry to a 20th century innovation called CDMA. Critics panned it, saying that, at 300 Pqbits/s, it didn't improve much over the Ericsson model released last month.
