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If humans contacted aliens, the astrobiologist would be the man in charge of sending the first message. So what would he say?

**Question: **If you were the first human to
communicate with an
alien civilization, what would you say?

**Paul
Davies:** Well first of all
we have to understand that they’re unlikely to speak English unless
they’ve
been studying us for a long time and that it’s hard enough to
communicate
properly between different people on this planet, all part of the same
species,
the cultural gulfs of misunderstandings are of course notorious. We’re now dealing with a completely
separate species. Then you have to
think what on Earth have we got in common, so I feel that our
communication
will be… we will want to let ET know our finest achievements, the things
we’re
most proud of and if you just go out on the street and ask people well
what do
you think are our finest achievements, chances are that you’ll be told a
Beethoven symphony or a Picasso painting or something like that and I
have no
quarrel with that, but the problem is that our appreciation of works of
art and
music are very much tied to our cognitive system and an alien whose
brain is
wired differently probably wouldn’t have any understanding of it and
certainly
wouldn’t have any understanding of politics or sport or anything of that
sort,
so there would be no point in sending those things. Now
there is one thing we’re all agreed that we must share
and that is mathematics.
Mathematics is universal.
It’s discovered by human beings, but the rules of mathematics are
the
same throughout the universe and the laws of the universe.
Our mathematical relationships or the
underlying laws of physics we can cast in mathematical form, so if they
are
communicating with us if they have technology they will understand the
laws of
physics and the nature of mathematics.
These are things that we can share, so it seems to me that our
communication will begin in terms of mathematics and physics.

So me, I’m a mathematical physicist, so you might say well you would say that wouldn’t you, but I really do think that this is the common currency of the cosmos and so we will want to communicate about our understanding of mathematical physics, so we could tell them things that we have discovered in the realm of mathematical physics, but there is stuff that I would like to know. There are some famous problems like how to bring gravitation and quantum physics together, the long-sought-after theory of quantum gravity. That’s one thing that I would like to know. It may be hard to understand the answer that comes back. There is something that is perhaps a little easier. There is a quantity in the theory of quantum electrodynamics called the fine-structure constant. I’m getting technical here. It’s a particular quantity. It’s a fundamental constant of nature. It has a value of about 1 over 137. Nobody knows why that number is as it is. It’s a pure number. It doesn’t matter what units you use and it’s long been an interest of mine as to how that number has arisen in nature, why that particular number and none other, so I would like ET to give me the explanation for that. Of course the answer might be we don’t know either. It’s not clear that ET will be all-knowing.

**Recorded April 15, 2010**

Interviewed by Austin Allen