Discovery Shows Universe Could be Full of Life
Source: AFP Published: 11:23 AM Wednesday January 31, 2001
WASHINGTON - The chemical elements required to develop life on Earth could have originated in space with the formation of the solar system, US scientists said today.
In their research, published today in the journal Proceedings of the National Academy of Scientists, scientists created an environment similar to "empty space," freezing a mixture of ice, carbonated gas, carbon monoxide, ammonia and methanol at temperatures nearing absolute zero.
They then bombarded the mixture with ultraviolet rays to reproduce the conditions in the dense interstellar clouds that birthed the solar system.
The complexity and diversity of cells produced in the experiment astonished researchers, who stated, in effect, that those newly-formed cell membranes were at the origins of life.
When the researchers added water to the mixture, some of the solids spontaneously formed membranous vesicles that converted energy from ultraviolet light into visible light, necessary to create life.
The hypothesis gives renewed credence to the "panspermia" theory; that the process of creating life on Earth was begun millions of years ago when chemical compounds were dropped on the nascent planet by comets, meteorites or space rubble.
Though the scientists remain cautious about their discovery, they nonetheless affirm their conclusions support the possibility of life in other solar systems.
"Very complex organic molecules that might be important for the origin of life could well be falling on the surfaces of newly-formed planets everywhere in the universe," said Louis Allamandola of NASA's Ames Research Center in California's Silicon Valley, who led the team.
"This discovery implies that life could be everywhere in the universe."
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