© Kahn & Selesnick
Anyone interested in extraterrestrial life, at some point, looked up at the night sky and asked, “What are they like?”
It is a good question and there are endless possibilities. Extraterrestrials may be beyond our comprehension, but it is also possible that they look like us humans. Scientists say extraterrestrials and humans can share similar DNA.
A few years ago, Jocelyn Bell Burnell, a physicist and professor at the University of Oxford, told the Euroscience Open Forum in Dublin that does not suspect that we will have signs of life elsewhere, perhaps even intelligent, within the next century. But other scientists said that extraterrestrials are waiting for the right moment before making contact.
If we get in touch with an intelligent extraterrestrial civilization, it will be the greatest moment in human history. But are we prepared to face them face to face?
Many of us wonder what extraterrestrials would be like. They could be totally strange in appearance, unlike anything we can imagine. Another possibility is that they may be a lot like us and maybe even a little bit like humans.
The appearance of the aliens depends not only on the conditions of their home world, but also on the composition of their extraterrestrial DNA.
According to scientists at McMaster University in Hamilton, Ontario (Canada), we must not rule out the possibility that humans and aliens share the same DNA, which could be part of a “universal structure”.
Professor Ralph Pudritz of McMaster University believes that the idea that aliens might look like humans is not so absurd. Pudritz’s theory is based on current research on amino acids that have 20 standard chemicals, which contain DNA that can develop human life.
Of those 20, there are 10 that researchers confirmed that existed millions of years ago and can be formed lifeless.
Purditz concluded that these 10 are simpler, require less heat and less pressure than more complex acids, meaning that they are more likely to survive in hostile environments. And although the exact conditions of the meteorites are not known, they are believed to be hot and hydrated, which would make conditions comparable to those of a young Earth.
This can imply a universal structure of the first genetic codes anywhere. There is a theory that they could be made in the warm interiors of meteorites large enough.
Thermodynamics is fundamental. It must be sustained at all points in the universe.
If you can show that there are certain frequencies that fall in a natural way like this, there is an implicit universality. It needs to be tested, but it seems to make a lot of sense.
Although no hard evidence has been found to support Pudritz’s theory, it raises interesting questions about how much aliens might look like to the human race.
I don’t think we can predict anything about it yet. There would probably be a difference, but it would depend on your specific environment.