Like any toddler, the infant Sun was an absolute trial.
Once upon a time, we thought that these outbursts would have posed a hindrance to life on Earth. But
Earth is the only place in the Universe on which we know for a certainty that life exists. Yet we don't know why some 4 billion years ago complex chemistry began to self-replicate like it did. We have a very rough idea of the basics, but the specifics are proving a little tricky to piece together.might play a role, interacting with molecules, heat, and water to form amino acids, the basic molecules on which life is built.
It was then suggested galactic cosmic rays might have been involved. Experiments mimicking this process irradiated a simulated early atmosphere with protons, resulting in more suitable production of amino acids. But whether the irradiation of galactic cosmic rays was sufficient during Earth's early development to provide the kind of chemistry necessary for life remained debatable.
The team made a number of gas mixtures simulating hypothetical atmospheres of early Earth, containing molecular nitrogen, carbon dioxide, water vapor, and methane in various proportions. These mixtures were placed in a chamber, where they were subjected to either proton irradiation, to mimic the effect of solar flares, or electrical discharges, to simulate lightning.
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