Re: No Confirmed UFOs Ever So Far - perhaps long lived

On 6/11/2020 8:23 AM, a425couple wrote:
> On 6/10/2020 5:49 AM, Porcospino wrote:
>> On 2020-01-05, casagiannoni  optonline.net 
>> <[email protected]> wrote:
>>> Not surprizing, even considering that intelligent apace faring 
>>> species must
>>> abound throughout the universe,  considering the vast interstellar 
>>> distances.
>>> Even at near light speed, which is extreemly unlikely, travel times 
>>> would be
>>> prohibitively long.
>>>
>>
>> Would they really be 'prohibitively' long, however? We know that
>> propulsion systems capable of reaching the nearest stars within a human
>> lifetime are possible (e.g., nuclear pulse as in Project Orion, or laser
>> sails). Given the age of the universe there may be civilizations
>> who have existed for billions of years: even travelling at a fraction of
>> the speed of light that's more than enough for a civilization to cross 
>> the
>> Milky Way several times, albeit at a slow pace and over many generations.
>>
>> Nothing in physics or engineering prevents it, more so for a spacefaring
>> civilizations which, you'd assume, can command enough energy to do this
>> at little relative expense (without any breakthrough in physics). Time
>> and propulsion systems are no obstacle, unless you believe that a
>> closed-cycle life support system capable of working for centuries is
>> impossible (not just from the perspective of present human technology
>> but for everyone in all circumstances), or that no living being can
>> adapt to prolonged life in space (even within envisioned settlements
>> such as O'Neil cylinders) and thus cannot be away from a planetary
>> surface for more than a few years.
>>
>> Setting aside the 'UFO' question, towards which I'm a skeptic, I think
>> it's easier to explain the Fermi paradox in terms of not having observed
>> long enough. We have not been around (or been paying attention) long 
>> enough
>> to claim that no intelligent species capable of interstellar travel 
>> /ever/
>> existed.
>>
> Yes.
>  From the point of view of most humans, the travel time
> to get to other inhabitable planets seems 'prohibitively' long.
> Perhaps a very long lived and very developed alien species
> is out there, and has for quite some time been exploring
> the universe.  Perhaps it last checked in on our solar
> system and found interesting life 10,000 of our years
> ago.  Perhaps they have a follow-up inspection planned
> in 10,000 more years.
> 
> Or, perhaps it was 100,000 years ago, and not again
> for another 100,000 years.  There are just so many interesting
> and challenging places to check out!
> 
> But our attention span (and perhaps species life span)
> seems too short.

Read "We are Legion (We are Bob)" by Dennis Taylor:
    https://www.amazon.com/We-Are-Legion-Bob-Bobiverse/dp/1680680587/

Lynn