About Search 4 Xtraterrestrial Life

In this blog, I talk about how aliens might live, how their bodies might function, what types of aliens there might be, and the possible structures in an alien society. I bring you up-to-date news about anything in space involving the possibilities of life. Also, I talk about the histories of our own species, and their endeavors into space. Please subscribe to my blog, and enjoy reading it!

Some posts include: http://search4xtralife.blogspot.com/2008/12/terraforming-morals.html

http://search4xtralife.blogspot.com/2009/02/alien-diplomacy_09.html

http://search4xtralife.blogspot.com/2009/01/space-faring-civilizations-beginnings.html

Monday, December 29, 2008

Let There Be Light

How might life forms evolve at different distances from a star? If a planet revolved around a red dwarf star at Mercury's distance, there might be life on it. If a planet revolved around a blue giant at the distance of Saturn or Uranus, there might be life there. How would life forms be affected by the different wavelengths and frequencies its parent star give off? An alien life form might have different senses than other lifeforms. It would detect heat and sounds, running from predators and hunting for prey. It might also communicate by interupting these different frequencies with other sounds. One way an alien might even survive is by using photosynthesis and absorbing different types of radiation for energy. But some creatures might avoid utilizing these forms of radiation, forming defenses and protection. They might form a hard, thick shell and burrow underground. How might different alien life forms live amidst radiation?

Friday, December 19, 2008

Anti-Aliens - Can aliens be made of anti-matter?

Yin and Yang, opposites of each other. Yet you need both to have perfection. Could there be such a thing as aliens made up of anti-matter? It is possible, and many scientists believe this. Skeptics say that anti-matter species could not exist in this universe - but we only know so little about the universe. Could there be minute specimens of antimatter which have no contact at all with matter? If so, then the scientific inquiries of quantum physics and all other sciences previously explored will have to be reexamined. But could there be anti-life?

Thursday, December 18, 2008

Transformers: Is Mechanical Life Possible?

In the movie Transformers aliens that are not based on amino acids exist. Is it possible? It could happen, theoretically. If chemicals interacted with certain life-forming substances, then it could create metals that could possibly reproduce. Lifeforms made of metals and rock could go anywhere, and wouldn't have to worry about any atmospheres. All they would have to worry about is temperatures, gravity and pressure. Otherwise, they would literally melt. Do you think that mechanized lifeforms could exist?

Wednesday, December 17, 2008

Terraforming: How May Native Organisms Be Affected?

Before, I told of how terraforming may affect humans and the planet itself. But what of the native aliens that may possibly exist? We do not know how industrialized wastes may mutate them, or how heat may affect them, or even if water, the building block of earth life, may make them change. Any single-celled life will reproduce quickly enough to possibly adapt to a new environment, and a few multi-cellular lifeforms may survive. But how will any new aliens evolve? they will have to reproduce quickly, producing many generations in succession. The aliens will have to create new respiration systems, new immune systems.... almost everything their ancestors have adapted to will have to be changed, and quickly if they want to survive. Terraforming, if there is native life on a planet, will change the entire face of a planet.

Tuesday, December 16, 2008

Terraforming: Morals

In the future, if we survive, we will have to travel to Mars, Jupiter and other planets. Some people will want to live in large, sci-fi space domes. Others will want to terraform. What is terraforming? Terraforming is the process by which a body in space is altered to a different state, or one like our Earth's. What are the dangers or morals of terraforming a planet? Some dangers include accidentily altering the planet in the way you don't want to, putting it into an eternal ice age or global warming epidemic, like Venus. Scientists and other groups will want to keep the native "habitat" and research it. These groups will include the environmentalists, alarmists and (possibly, though not likely) politicians. These people will hold technology back, not allowing any "contaminants" from Earth to land and take root. The idea of terraformation has come up many times in history; when will it finally happen?

Monday, December 15, 2008

New Levels of Intelligence

Humans have reached a critical stage in their evolution. We have invented the nuclear bomb, have invented electricity and have begun the space age. Our populations are soaring, and we are reaching heights never achieved by any (known) prior lifeforms on this planet. Though now we are polluting the earth, caring nothing about recycling and green energy. Does intelligence have new meaning? By my personal definition, intelligence is the ability to use your natural resources and be able to create new things out of them. Some "intelligent" species include the octopus, the chimp, the ant, the bee, and the human. Though humans have created many, many new things. Now, intelligence carries a new meaning. It is now defined as using logic and thought to spread your recources to all the population evenly. We are making many species endangered, like fish and many other food resources. Might other alien species have reached the same problems we have reached now?

Sunday, December 14, 2008

Becoming a Civilization: Obstacles and Problems


For us humans, our point of civilization began with fire. From there our technologies progressed to the wheel, farming and social structures. Though would an alien civilization begin differently? They might live in a different environment which would have diferent forms of life, different climates and different rotational periods. If they lived in a very hot climate, their technologies would revolve around water or a cool liquid. If the aliens live in the ocean, then their technologies might revolve around propulsion or movement. If any aliens had no prey, then they would focus on defensive technology. If aliens lived on a body like the moon or Mercury, then life may be a cycle of being dormant and surviving. Some cycles may be so short that only microbial life can sustain itself. There are many diverse environments in our universe; we cannot expect the same type of civilizations to arise everywhere.

Friday, December 12, 2008

How Gravity Affects Life

Gravity can change the way things evolve. On a large, very dense planet there will be a larger gravitational force. Any lifeforms there will be denser, and much more heavyset. They will possibly be small in size. They will need that to withstand the great pressures on the surface. On a small planet, the size of Mercury or Mars, lifeforms will be more exotic. Aliens may be larger, though have much less density. Their bodily functions will vary, depending on the amount of gravity. On a light-gravity planet life forms may have a porous skin, so they can move faster. How do you think gravity has affected evolution on our planet?

Thursday, December 11, 2008

Size Does Matter!


When looking for planets with life, it is a good idea to keep the size of the planets in mind. Small planets, no matter how small, can still host life. Though super-large planets will have a less likely chance of having life on them, they will still be more restricted on the types if life. The larger a body, the stronger its gravitational pull is. Life forms may be crushed by gravity. Life forms can exist with little gravity. Microbes can even exist without gravity! So size does matter.

What is the Temperature Limit for Life?

Life as we know it on Earth can only live actively in a temperature range of -50-135 degrees fahreheit. Certain species may be able to survive this, except they will only be able to remain in a dormant state. Below this post I said that it is too hot for life. Is it? Can aliens possibly be adapted to temperatures? This is probable, except there would probably be an established temperature range designated at the beginning stages of evolution. This would be affected by enviornment, chemistry and the bodily processes of the organism. Once evolution has continued past the multi-cellular organism stage, life will not be as able to adapt to different temperatures. Their evolution and genetic codes will become more complex, designating certain enviornments in which something can live.

Does Life Need Water to Exist?

Our scientists speculate that many moons orbiting other planets may harbor life. But these moons and planets have ice on them. Mars has carbon dioxide in its ice, and Europa has methane ice. Triton has a form of liquid water that flows from "volcanoes". But what about other bodies? Venus may have microbes on its surface, and Jupiter may have hugs gasbags that are alive. There also microbes which could easily survive the vacuum of space, existing right here on Earth! Whenever we think about life, we think of life like our own here on Earth. But other life forms will differ from our own, from different bodily fuctions to entirely different amino acid combinations. Us humans just have to keep an open mind.

Wednesday, December 10, 2008

Traces of Carbon Dioxide Found in Exoplanetary Atmosphere


Traces of carbon dioxide, one of the building blocks of life, has been found on a planet orbiting another star. Even though it orbits its parent star in 2.2 days, and it is too hot for life, it is still an exciting discovery. Previous observations of this planet have shown traces of water vapor and methane in its atmosphere. This discovery was made using the Hubble Space telescope and the Spitzer space telescope. Also, this is the first time a near-infrared emission spectrum has been used to see an exoplanet.


Picture of the Swan Nebula


Tuesday, December 9, 2008

Nebulae more violent than thought

Images from Nasa's Spitzer telescope show streams of gas flowing around stars at speeds of up to 4.2 million miles per hour. This is the Swan Nebula, about 6,000 light-years away. These stellar winds are intense because of the many stars forming in a close area. This is just more proof that stars do not form in a calm, quiet nursery.

Thursday, November 27, 2008

Alien Languages and Speech

Last night I watched Star Trek, in an episode where the aliens spoke English, except they spoke in metaphors. In reality, aliens would not speak English. In fact, they might not even have earth-like vocal cords. Aliens might have liquid in their bodies which emanates noise outwards. They might communicate in ultra-high or ultra-low frequencies, or use telepathy. Aliens could use sign languages or movements to say things. If humans find alien life, we might not be able to ever understand them. We may find out how these aliens communicate, but we might not understand them.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Monday, November 24, 2008

What Might Affect Alien Life?

Location, Location, Location. It might not matter on how far from a star the planet/moon is, but on how geologically active it is. Triton, a moon orbiting around Neptune over 2 billion miles away from the sun, may support bacterial life forms. Triton is home to a deep system of hydrothermal vents, with ammonia ice slush on the surface and warmer, possibly liquid soup in its interior. Io is the most volcanically active body in our solar system, with its molten surface always changing due to the intense gravitational pull of Jupiter. Europa may have a vast ocean under its surface, though we do not know how earth-like life may breathe here. Mars, a likely candidate, was likely to have had previous life; any present life is deep under the surface. Venus may host many species of extremophiles living off of its carbon atmosphere. Triton has many methane lakes larger than Lake Michigan, and "snow" that creates dunes over 7 x the size of those on Earth. These diverse enviornments may harbor life very different from our own.

Extremophiles - Food for thought

We have found many diverse life forms on our planet. The hardiest of all life forms on Earth are a group of bacteria called extremophiles. Last year scientists thawed out bacteria over 50 thousand years old; the bacteria, after unfrozen, was alive! This shows that life, even on Earth, are prepared for harsh conditions. There are many variants of bacteria that live near melting lava, grow in 7,000 degree F, and underground under enough pressure to crush a human being. One bacteria, found over two miles underground, is able to withstand over 1,500 X the radiation of a nuclear bomb. Another is able to breathe not oxygen, but carbon dioxide. Our life forms here on Earth are diverse; how complex might other life forms be?