Alien Citadel - Everything Extraterrestrial
Showing posts with label alien civilizations. Show all posts
Showing posts with label alien civilizations. Show all posts

Friday, August 27, 2010

Alien Civilizations and the Escape Clause - The Big Bang Singularity

Time Zero

Pity the hapless soul who comes face to face with a singularity, the nemesis of anyone trying to find a finite, well-defined solution to an equation. Einstein notably despised these mathematical beasts. In the 1930s and 1940s, while working with his assistants on various attempts to unify the various aspects of nature, he counseled that singularities were unnatural, even ungodly. Like a meticulous merchant wrapping up a precious package, he felt that an intelligent creator would not allow open ends. This cautionary note was passed down by Einstein’s assistants, such as Nathan Rosen, to their own students. For example, Fred Cooperstock, a student of Rosen’s, was used to such admonitions. Distaste for singularities has not faded over time. Today, despite the hard evidence of the background radiation, many researchers still find it hard to accept the idea that the universe was created in a state of infinite density and zero volume. How could it ever get out of such a state? Almost nobody doubts there was a period in the early universe when it was extremely hot and dense; in fact, WMAP and other measures of the cosmic microwave background provide unmistakable proof. There have been numerous other attempts to account for this radiation, but none of them can explain why its temperature is very nearly the same in all directions. Thus, for want of a better explanation most cosmologists accept that it is the remnant of a primeval fireball. The debate has to do with the Big Bang singularity itself. Could there be a way of accounting for all observed cosmological results without having the mathematics of the theory go haywire some 13.7 billion years in the past? Could the initial creation of matter be explained by a known physical process, rather than just by fiat? In the late 1960s, Hawking and Penrose demonstrated that just as black holes must have final singularities, the standard Big Bang must have had an initial singularity. The theorems they proved assumed that the universe contained material of typical density and pressure and that its dynamics could be modeled through ordinary general relativity. Most physicists have accepted these conditions as reasonable and have resigned themselves to a universe of indeterminate origin.

Evolution of the Universe

Quantum fluctuations
In recent decades, however, researchers have sought ways around this knotty issue. One such proposal was put forth, interestingly enough, by Hawking himself. At a 1981 conference organized by the Vatican, he suggested that space-time has no boundary. By substituting “imaginary time” (mathematically, real time multiplied by the square root of negative one) for real time, Hawking found that he could transform the Big Bang singularity into a smooth surface— akin to Earth’s South Pole. Just as Antarctic explorers don’t fall off the face of the Earth when they pass the pole, but rather change their direction from south to north, Hawking argued that if someone could travel back in imaginary time, past the Big Bang, they would simply start to move forward in time again. This is all well and good and shows a mathematical way of eschewing the initial glitch. However, to many physicists this explanation doesn’t seem physical enough, given that nobody can really travel in imaginary time. Other suggestions for eschewing the initial singularity have been based on quantum randomness. In 1973, Hunter College physicist Edward Tryon published a provocative article in the prestigious journal Nature, entitled “Is the Universe a Vacuum Fluctuation?” In quantum field theory, particles continuously pop in and out of the vacuum froth. Tryon pointed out that under extraordinarily rare circumstances a particle could randomly emerge from the foam with the mass of the universe. Though the chances of it coming forth at any given moment would be almost nil, it could literally take all the time in the world to make its debut. Eternity’s infinite patience would guarantee its emergence. This quantum fluctuation would serve as the creation event for the entire universe we see today.

Friday, June 25, 2010

The Search for Extraterrestrial Intelligence - Inspired by Religious Faith?

While science and religion are seen to be two opposing poles of a stick, never fated to meet, it seems the most ardent of tasks was inspired by religious faith after all, the search for extraterrestrial intelligence. The question that remains is, will you find the average Joe of an alien a church regular? Do you expect alien civilizations to be obsessed and compulsively driven by religion as humans?

Some scientists acknowledge the religious impulse that inspired their study of alien life. Carl Sagan was not among them. Although he was reluctant to accept religious interpretations of SETI research, Sagan used religious explanations to challenge the validity of UFOs. In an essay he contributed to the Encyclopedia Americana, Sagan argued that unidentified flying objects had less to do with scientific curiosity than with unfulfilled religious needs. For some people, he wrote, flying saucers “replace the gods that science has deposed.” When novelist Cynthia Ozick interviewed Sagan for a popular magazine, she noted the religious overtones of Sagan’s extraterrestrials. She said, “What you postulate is Angels. Faith, the same old faith.” Sagan retorted, “Not faith. Calculation. Extrapolation.” 2 Nevertheless, Sagan’s eldest son, Dorion, supported Ozick’s conclusions. Dorion, a science writer, scoffed at the search for extraterrestrial intelligence. He said it was nothing more than a replacement for religion in a secular age. Meanwhile, Sagan’s colleague Frank Drake readily admitted that a fundamentalist religious upbringing was the initial inspiration for him and others to join the search for advanced alien life. Granted, Drake repudiated his religious training in his youth. Nevertheless, in his mature years, he claimed that the extraterrestrials are virtually immortal and perhaps willing to pass on the secret of immortality to humans. When depicting the life and culture of intelligent aliens, anthropomorphic thinking enters to fill in the missing details. Extraterrestrials, we learn, are remarkably like us. They study mathematics and science, practice technology, and grapple with issues raised by warfare, environmental pollution, diminishing natural resources, disease, overpopulation, and energy crises. This blatantly anthropomorphic portrayal of alien culture is accompanied by the disclaimer that aliens are biologically different from humans.

Anthropomorphic thinking, however, lies close to the surface of speculation about extraterrestrial intelligence. SETI pioneer Frank Drake was once asked what form an intelligent alien might assume. He answered:

"They won’t be too much different from us. What I usually say, when people ask me that question, is that a large fraction will have such an anatomy that if you saw them from a distance of a hundred yards in the twilight you might think they were human."

Drake continued his description by noting that it was advantageous to walk upright on two legs with your head on top, eyes near the brain, and mouth near the eyes. He clearly believed that human anatomy serves as a pattern for intelligent aliens. Well, old Gorn on the left won't complain! When Drake was asked if aliens were real, he candidly responded: “You talk about something enough times, you begin to believe it. And we sure talk about this a lot.” Since the seventeenth century, philosophers and scientists have understood that anthropomorphic thinking exists in science. That is why scientists differentiate fact from value, resist granting humans a unique status in the universe, and avoid searching for purpose in the cosmos. Scientists claim they can produce objective knowledge even though their work rests upon human perception and understanding of the physical world. Sagan had his own solution to the problems introduced by anthropomorphism. He asked scientists to reject the chauvinisms that marred their thinking. A chauvinism is simpler to overcome than entrenched anthropomorphic thought because the former is easier to recognize and vulnerable to rational argument.

The main chauvinism that threatens the study of extraterrestrial organisms is the widespread belief that life must have the same physical basis everywhere in the universe. Sagan identified oxygen, carbon, ultraviolet light, and temperature chauvinisms. Each of these rests upon the false assumption that terrestrial and alien life have identical chemical and physical requirements.


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