neillaubenthal wrote:
I can understand pyramids being built by people…and things like the Easter island heads and Stonehenge. However…there are those drawings in the dessert…some of which are a mile or so long…and since the ancients couldn’t fly how could they have laid them out so precisely? And why…since they can only be seen from the air? And some of the, have arrows pointing tens to hundreds of miles away very precisely.
And…although we have no proof either way…with the size of the universe and assuming life evolved…the likelihood that in the billions of galaxies with billions of stars it only happened once is laughably small. Entire civilizations could have evolved, explored, and died in a supernova before our sun was even born.
One can’t prove it either way…but the likelihood of intelligent life either before sun existed or now is essentially 100%. Now whether one is close enough to see their radio emissions or not or travel here or not…but just as the Egyptians would be mystified by smart phones and movies…humans today would be equally mystified by tech that a race 25,000 years more advanced might have. They would/could look at faster than light travel and wormhole transits and teleportation as everyday things like we consider smartphones and and MILC.
I can understand pyramids being built by people…an... (
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Are we even sure other life-forms would attempt to communicate using radio waves?
Maybe they use gravity, or light, or ?
The use of radio-waves as communication by the Search for Extra-Terrestrial Intelligence (SETI) has been restricted to specific frequencies, however this is changing(**) and wider search parameters may provide more chances for ETI confirmation.
Some predictions of the probabilities of communicating-beings “out there” somewhere.
The famous (or to some ‘infamous’) Drake equation(*) supposedly predicts the probability of life in the vastness of the Universe.
A problem is we (humans):
A. May not have identified all the parameters, and:
B. Do not know enough about some of the parameters listed!
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(*) The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy. (Appended at end).
The equation was formulated in 1961 by Frank Drake, not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first scientific meeting on the search for extraterrestrial intelligence (SETI). The equation summarizes the main concepts which scientists must contemplate when considering the question of other radio-communicative life.
It is more properly thought of as an approximation than as a serious attempt to determine a precise number.
Criticism related to the Drake equation focuses not on the equation itself, but on the fact that the estimated values for several of its factors are highly conjectural, the combined multiplicative effect being that the uncertainty associated with any derived value is so large that the equation cannot be used to draw firm conclusions.
(**) SETI, the search for extraterrestrial intelligence, has traditionally focused on radio frequencies higher than a gigahertz, such as the hydrogen-line frequency at 1.42 GHz. SETI astronomers tend to shy away from lower frequencies because Earth's atmosphere renders observations noisy.
However, Europe's Low Frequency Array, or LOFAR for short, is specially designed to conduct radio astronomy at these very frequencies.
“The Low Frequency Array (Lofar) is the world’s most sensitive low-frequency telescope, operating from 10-250 MHz. It’s composed of 52 radio telescopes with more on the way, spread across Europe. These telescopes can reach a high resolution when used in unison.”https://theconversation.com/seti-how-were-searching-for-alien-life-at-previously-unexplored-frequencies-21850~~~~~~~~~~
”This search used the high band antennas to listen for radio signals at frequencies of between 110 and 190 MHz. Primarily, the search is looking for leakage from high-power transmitters, such as planetary radar or communications with spacecraft. The search encompassed 1,631,198 target star systems identified by NASA's Transiting Exoplanet Survey Satellite (TESS) and the European Space Agency's Gaia astrometric probe.”https://www.space.com/alien-life-hunt-lofar-radio-frequency-seti