Blast from the Past! Where Are All the Aliens?

The earth has been able to broadcast our existence with radio waves a short 100 years or so. What are the odds that we will still be around to continue our broadcasts in the next 1,000 years or so? It seems probable that our highly sophisticated level of technology will allow us to destroy ourselves in that timeframe, if we are not destroyed by other violent events like a huge asteroid impacting our planet. 1,000 years is a very short period of time. Maybe there have been many civilizations that developed to our level of technology, but we don't see evidence of them because they were around during a very short window of time, and that window doesn't correspond to the short window of time humans have been sophisticated enough to even look for them.

The earth has been able to broadcast our existence with radio waves a short 100 years or so. What are the odds that we will still be around to continue our broadcasts in the next 1,000 years or so? It seems probable that our highly sophisticated level of technology will allow us to destroy ourselves in that timeframe, if we are not destroyed by other violent events like a huge asteroid impacting our planet. 1,000 years is a very short period of time. Maybe there have been many civilizations that developed to our level of technology, but we don't see evidence of them because they were around during a very short window of time, and that window doesn't correspond to the short window of time humans have been sophisticated enough to even look for them.