Comet May Have Sparked Life on Earth
The discovery seems like a typical sci-fi Hollywood film: life on Earth may have come from space, and this time it's the comets in the spotlight. According to research completed by scientists at the Lawrence Livermore National Laboratory, comets crashing into Earth may have sparked life on the planet, as reported by Fox News.
Comets contain the necessary elements that could jumpstart life, and scientists believe that a collision with Earth in the early years would have resulted in life beginning on the planet. Elements such as water, ammonia, methanol and carbon dioxide are significant raw materials found in comets that could have 'yielded an abundant supply of energy to produce amino acids,' the basic ingredient in jumpstarting life, according to Fox News.
Physical chemist and co-author of the study Nir Goldman explained that , "Amino acids have very basic starting materials -- you need some kind of carbon source like methane or carbon dioxide, a nitrogen source like ammonia, and water ice; comets have all these things in abundance," he told the Los Angeles Times. The study was published in the journal, "Nature Geoscience."
The study has had a long history, as Goldman had been working on a theory called 'shock synthesis' since 2006. The theory holds that when a comet collides into a rocky body, such as early Earth, the 'heat and pressure from the impact cause the chemical bonds in the comet's head to break apart while new bonds form,' according to the Los Angeles Times.
Using intricate, elaborate models, Goldman tested his theory on the computer while a team of scientists tested the theory in the laboratory using 15-feet guns that shoot steel balls at 4 miles per second. The laboratory team was led by Mark Price of the University of Kent in England, who offered to test Goldman's theory when the two met at a conference. The actual application of the theory was conducted twice using blocks of ice with similar components as comets, and the results show the presence of amino acids in the sample.
The study may answer the ubiquitous, lifelong questions of man about the origin of life. Most importantly, it affirms the possibility that there may be life elsewhere in space, where comets may also have collided.
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