Scientists recently found
evidence of strange objects orbiting a distant star, leading some to
speculate about the possibility that we have discovered signs of
engineering by some extraterrestrial civilization. This could be a
false alarm, but no one will be too surprised if one day soon the
first indisputable evidence of extraterrestrial life is discovered.
But if that happens, will it make scientists feel like brilliant
geniuses – or will it make them feel stupider than they have ever
felt before?
Two “Eureka, We're
Geniuses” Scenarios
I can imagine two ways in
which scientists might discover extraterrestrial life in a way that
would make them feel like Einsteins. The first way would be if
scientists were simply to discover evidence of extraterrestrial life
or a technological civilization, without finding any evidence that
there existed extraterrestrials more intelligent than us. Such a
thing could occur merely by the use of advanced spectroscopy.
Spectroscopy is a
technique that allows scientists to figure out what elements are
associated with a distant light source, by analyzing the spectrum or
pattern of lines produced when the distant light passes through a
prism or something working like a prism. Using such a technique,
astronomers may be able to detect oxygen in the atmosphere of a
planet revolving around a distant star, which could be an indication
of life (scientists don't think our atmosphere had much oxygen until
life was widespread). They may also be able to detect elements or
compounds that could be markers of civilizations.
Such a discovery would
tell us nothing about how advanced a civilization was, but would at
most tell us that some civilization existed. If such a discovery were
made, scientists would have every reason to feel pretty smart. They
would have made a long-awaited fundamental discovery, without finding
anything that proved that man was inferior in intelligence to some
other extraterrestrial race.
Another very different way
to look for extraterrestrials is to search for radio signals from
extraterrestrial civilizations. Imagine if such a signal were found,
and scientists were able to decipher or translate the signal. Then
scientists would feel like geniuses. No matter how advanced the
civilization turned out to be, there would be a certain type of "we're
kind of on the same level” feeling, if we had managed to decipher
or translate a signal extraterrestrials sent out. You may not be on
the same level as Einstein, but when you read some difficult thing he
wrote, and are able to understand it, you feel pretty darn smart.
Two “Oh My God, We're
Dummies” Scenarios
But I can also imagine two
scenarios under which the discovery of extraterrestrial life might
make us feel very stupid. The first scenario is one in which we
receive radio signals from extraterrestrials, but simply are not able
to figure them out. This is all-too-likely a scenario. An
extraterrestrial civilization might be millions of years more
advanced than ours. So why would they “dumb down” their radio
messages, making them simple enough to be understood by beings who
only invented radio telescopes a few decades ago? It seems that if we
were to receive radio signals from extraterrestrials, there is a
large chance that we would spend decades knocking our heads against
the wall, trying to understand the messages without success. We
might feel a little bit smart for having received the radio messages,
but we would feel a lot dumber because we couldn't translate the
messages. Twenty years after the radio messages were received, we
might see headlines like the one below.
Another possibility with a
high chance of happening is that we might discover signs of some
massive engineering project by extraterrestrials. We might analyze
the light from some star, and find that there seems to be massive
abnormalities that can only be explained by assuming that some
extraterrestrial civilization has undertaken some vast engineering
project millions of times more ambitious than building the Panama
Canal (perhaps something involving dismantling and rearranging entire
planets). Such a project could only be undertaken by a civilization
many thousands or millions of years older than ours.
How would we feel after
discovering such a situation? We would feel pretty stupid. We would
know that there was some other civilization with godlike technical
powers vastly beyond ours. We would also suspect that the more we
looked, the more such civilizations we would find. Climbing down
meekly from the pedestals we have placed ourselves on, we might sadly
realize our rightful places as tiny little fish in the vast cosmic
ocean, not the lords of creation we once imagined ourselves to be.
Or maybe we wouldn't.
Maybe we are so hooked on thinking of ourselves as the most important
creatures in the universe that we will refuse to believe almost any
evidence contradicting such an idea. I can imagine humans of the
future refusing to believe in any evidence astronomers produce that
godlike extraterrestrials exist, no matter how clear and dramatic it
is. Perhaps the only thing that will convince us of our cosmic
inferiority will be if spaceships bigger than stadiums begin
to hover in our skies night after night.
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