Did Life on Earth Come from 'Microlightning' Between Charged Water Droplets?

Some scientists believe life on earth originated in organic matter in earth's bodies of water more than 3.5 billion years ago," reports CNN. "But where did that organic material come from...?" Maybe electrical energy sparked the beginnings of life on earth - just like in Frankenstein: Researchers decades ago proposed that lightning caused chemical reactions in ancient Earth's oceans and spontaneously produced the organic molecules. Now, new research published March 14 in the journal Science Advances suggests that fizzes of barely visible "microlightning," generated between charged droplets of water mist, could have been potent enough to cook up amino acids from inorganic material. Amino acids - organic molecules that combine to form proteins - are life's most basic building blocks and would have been the first step toward the evolution of life... For animo acids to form, they need nitrogen atoms that can bond with carbon. Freeing up atoms from nitrogen gas requires severing powerful molecular bonds and takes an enormous amount of energy, according to astrobiologist and geobiologist Dr. Amy J. Williams [an associate professor in the department of geosciences at the University of Florida who was not involved in the research]. "Lightning, or in this case, microlightning, has the energy to break molecular bonds and therefore facilitate the generation of new molecules that are critical to the origin of life on Earth," Williams told CNN in an email... For the new study, scientists revisited the 1953 experiments but directed their attention toward electrical activity on a smaller scale, said senior study author Dr. Richard Zare, the Marguerite Blake Wilbur Professor of Natural Science and professor of chemistry at Stanford University in California. Zare and his colleagues looked at electricity exchange between charged water droplets measuring between 1 micron and 20 microns in diameter. (The width of a human hair is 100 microns....) The researchers mixed ammonia, carbon dioxide, methane and nitrogen in a glass bulb, then sprayed the gases with water mist, using a high-speed camera to capture faint flashes of microlightning in the vapor. When they examined the bulb's contents, they found organic molecules with carbon-nitrogen bonds. These included the amino acid glycine and uracil, a nucleotide base in RNA... "What we have done, for the first time, is we have seen that little droplets, when they're formed from water, actually emit light and get this spark," Zare said. "That's new. And that spark causes all types of chemical transformations...." Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life - a fact that has cast doubt on such theories in the past, Zare said. Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life. "We propose," Zare told CNN, "that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life."

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