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How Did Evolution Begin?
Life's ability to replicate itself is essential for evolution, yet even the simplest kind of replication requires a relatively complex system. So what kind of non-replicating system might have served as the predecessor of evolution, paving the way for life as we know it? The answer, according to a recent study, is a kind of "prelife" -- a chemical system that can lead to information and diversity, and that is capable of selection and mutation, but does not yet have the ability to self-replicate.
New Glimpses of Life’s Puzzling Origins - NYTimes.com
In the last few years, however, four surprising advances have renewed confidence that a terrestrial explanation for life’s origins will eventually emerge.
RNA World
The origins of life on earth remains a daunting scientific challenge. The difficulty is in trying to find evidence to infer what chemical reactions took place billions of years ago. There may ultimately be no way to settle the issue, but that does not mean the question cannot be addressed scientifically. (NeuroLogica Blog)
In The Prebiotic Kitchen
To explain the origin of life, scientists seek to explain the origin of its components. The three most important of these are RNA, DNA, and proteins. (The Loom | Discover Magazine)
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