We assume that the way humans see the world has some correspondence to
objective truth. That’s not necessarily correct. Let's do a thought
experiment where we have a quick chat with an alien species to see how
mistaken we are about the universe.
So we’ve
made contact with aliens, and some people are celebrating and others are
melting down with fear, but the overall consensus is that we should ask
them over for tea or something. It’s likely that tea time conversation
will be a bit stilted. What do people talk about other than what they
have in common? Although we may assume that we have the whole universe
in common, the aliens, if we just tweak their senses a bit, may be
living in a different universe from ours.
Let’s start
with the sense we use most to interact with the world. We knew there
were aliens out there because we could see the sun, the moon, the stars,
and even the planets in the solar system. And we could see those
things with our naked eyes, because we can pick up certain wavelengths
of light. All we had to do, even hundreds of years ago, was turn out
eyes upwards (sometimes with the aid of telescopes, true) to see the
potential for other worlds. The same is not necessarily true for the
aliens.
The tweaks
to their vision might be minor. They might just pick up, visually, on
different stars than we do, seeing things in the infrared range or the
ultraviolet range. Since we now have plenty of telescopes scanning the
skies and picking up on parts of the electromagnetic spectrum that we
can’t see, it would just be a matter of superimposing our visual star
maps on their visual star maps to get some common ground.
But what if
they don’t see anything remotely within our visual spectrum? Let’s say
that they evolved on a planet not powered by light from a nearby star,
but from vents from the planet’s core. Light, and vision, might not be a
big component of their senses. Perhaps, for whatever reason, they only
see ultra-high energy light given off by quasars, which perch at the
centers of galaxies. They wouldn't realize there was the possibility of
life in the outer reaches of a galaxy before we contacted them. Or
they might only be able to see quickly changing light, and can only
navigate space by pulsars. There’s even a possibility that they can
only, visually, pick up on very faint microwaves, and it never occurred
to them that there was life in the universe, because they only saw the
faint, homogeneous smear of the cosmic microwave background. Never mind
how we’d contact a society like that, how would we even begin to
explain who we are and where we came from?
If
we sorted through the first contact and they got to Earth, there could
be even more problems with light. If they only saw in x-rays, we very
well might look like bags of bones with weird, invisible flesh around
them. (Also, any prolonged exposure to alien “flashlights” would kill
us.) But what, for example, if they only saw polarized light? We know
that some animals can see polarized light, and it’s thought that they
navigate by the natural polarization that light goes through in the sky throughout the day.
But what if a species can see polarized light and nothing else?
Because vertical and horizontal surfaces polarize the light that hits
them, the aliens would see a multicolored sky, blinding walls of light
from windows, the hoods of cars, lakes, and puddles, but wouldn't be
able to see any humans. (Although they would, in sunlight, be able to
catch the intermittent glare coming from our glasses. How creepy would
that be for them?)
The number
of problems that can come with sound is near-infinite. We might have to
communicate with aliens, once they get here, with devices that make
ultra low frequency sound, or with dog whistles. We might have to
scream at them through a loudspeaker. Or we might only talk in
whispers, to keep from blowing out their eardrums. Even if they’re
able to hear within the frequency and volume that we do, and we are able
to communicate with them using our voices, their hearing might
encompass a very small range of frequency. We’d have to keep to a
monotone drone to keep from sporadically – from their perspective –
hitting the mute button. Their aural range might also constrain our
choice of ambassadors. They might only be able to comfortably
communicate with high-voiced women or low-voiced men.
But our
real problem might come with smell and taste. Humans, famously, have
terrible senses of smell and taste. One of the reasons we have to label
what’s in food is we don’t have the ability to smell or taste it
ourselves. This has gotten us in trouble when we gulp down food that is
filled with contaminants and bacteria, or touch something crawling with
viruses without knowing it.
The
problem here will not just be the social faux pas of offering the
aliens, from their perspective, obviously filthy food. The problem will
come when they distinguish people by smell in ways we can’t begin to
understand. People are crawling with microfauna. Some estimate that
the number of foreign cells in our body outnumbers our own cells ten to
one. There’s evidence that fruit flies choose their mates
based, in part, on the gut bacteria that their suitors carry. What if
aliens do the same? They might see humans as entirely different species
(or at least subspecies) depending on the bacteria, microbes, and
viruses they have on them at any given time. If an ambassador takes a
break from the initial talks with the aliens, and has some yogurt to
eat, when they walk back into the room the aliens might consider them an
entirely different person. The same might happen if they got a cold,
or changed their brand of fabric softener, or started to sweat. (Which
would be another creepy moment for the aliens. How terrifying would it
be if, while you're talking to a guy, he slowly, without acknowledging
it, morphs into a totally different dude?)
The big
problem would come, though, if aliens started taking the microbes more
seriously than they took us. Humans don’t do well without the bacteria
in our guts and on our skin. The bacteria, on the other hand, do
perfectly well without us, as long as they have a nutrient rich
environment. If you notice that the person you are talking to is
actually a sketchy framework upon which a thriving community of
thousands of smaller living beings lived, would you assume that the
large structure was sentient, or the small individuals living in it?
Once they get a whiff of us, aliens may consider us no more sentient
than we would consider an apartment building. They might think of us as
creations of the bacteria and viruses. If that's the case, from their
point of view they could disassemble us, while keeping the bacteria
alive. Taken from their perspective, they aren’t committing murder any
more than we would be if we trooped everyone out of a house, made
renovations, and walked them back inside again. One second we’re
contacting aliens. The next, we’re ushering in a well-meaning
apocalypse. It could happen. We’re almost indifferent to smell and
taste, and so we’re indifferent to our own microbial life. How would we
even begin to deal with a species that considered that kind of thing
important?
I say we don’t try to contact them at all.
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.