Sunday, August 14, 2016

WE ARE ALONE, FOR NOW

The Washington Post recently had a story about a question that humans have pondered forever: where are the other intelligent beings in the universe?

Italian physicist Enrico Fermi once famously exclaimed "Where is everybody!" “Scientists have been trying to answer his question with this logic: we exist, so aliens should exist too.

According to one new solution, we have not seen or heard from any galactic neighbors because we are still waiting for them to be born. And it will, according to the calculations, be a long time before we can throw other solar systems a baby shower. If you grade earthlings on a cosmic curve, as recently hashed out by Harvard and Oxford University astrophysicists, we’re at the head of the class.

And this done make some common sense. In school, we learned the basics about our universe. And we were told about the Big Bang Theory, that the center of the known universe exploded outward to form all the mineral, chemical and cosmic properties (galaxies, stars, comets, etc.) Earth sits at the outer edge of the center of the universe. When science has been trying to find other life, they direct their telescopes and listening devices towards the center. But should not they be pointing them at the sides of the Earth's outer edge - - - to systems as old as our solar system?

A new study published in the Journal of Cosmology and Astroparticle Physics calculated the probability that life as we know it should exist at any given point in the universe. Based on their assumptions, Earthly life is quite likely premature.

By the standards of the universe, humans are some of the earliest intelligent life around. You may have heard of ancient aliens on basic cable television. But, according to cosmic probability, the ancient aliens are us.
For life as we know it to arise, organisms require three things: carbon-based chemistry, liquid water and an energy source. The most crucial source of all three requirements is a star. Stars  fuse protons and electrons into carbon and other elements; stars heat up water in the so-called habitable zone and stars provide a steady sunny stream of radiation. Scientists scan the solar systems to find the right combination of star, planet distance and likelihood of water to see if it possible for organic life.

Stars play such an important role in our understanding of life that they dominate the researchers’ equation. The scientists’ timeline begins about 30 million years after the Big Bang happened, which as far as we can tell was 13.8 billion years ago. Their timeline ends far in the future due to the long-lasting red dwarf stars, which have lengthy wicks that burn for roughly 10 trillion years. (A yellow dwarf, by comparison, has a only 10 billion years of fuel.

Crucially, what red dwarf stars also have going for them is strength in numbers. The Milky Way is filled with red dwarfs. About three-quarters of all the stars in the galaxy are red dwarfs.

Our sun is not a red dwarf. It is a rarer thing, a yellow dwarf, a star 10 times more massive but one that will flare out much sooner. That we exist around a yellow dwarf, per the scientists’ equation, makes us the true space oddities.

So if Earth humans are the only intelligent life in the universe, why did our ancient ancestors almost universally say that the planet was seeded by alien beings? Why do most religions believe in a creation story of extraworldly gods and angels creating mankind? 

It could be the natural curiosity hard wired into the human brain - - - ancient humans looking up at the stars in the sky may have asked the same question as Fermi. We cannot be alone in the vastness of space.

Human beings also have a sense and need to belong to a bigger group, a family and a community. At a planetary level, that need stills exists. Ancient ancestors were wandering nomads scraping by a subsistence existence. They were one with nature and nature was bigger than them. And when small bands of people found other people in their journeys, it solidified the notion that they were not alone in this world. Communication and trade of ideas and beliefs would reinforce the global notion that there has to be life in the magical stars.

Scientists are still searching for confirmation of that magic in the stars.