RNA and peptides coevolving in the primordial world might have jointly served as a precursor to the modern ribosome.
Several projects are aiming to bring back mammoths and other species that have vanished from the planet. Whether that’s technically possible is beside the point.
When researchers gave a genetic molecule the ability to replicate, it evolved over time into a complex network of “hosts” and “parasites” that both competed and cooperated to survive.
Life could use a more expansive genetic code in theory, but new work shows that improving on three-letter codons would be a challenge.
The discovery that short peptides can form spontaneously on cosmic dust hints at more of a role for them in the earliest stages of life’s origin, on Earth or elsewhere.
A 3D digital model of a “minimal cell” leads scientists closer to understanding the barest requirements for life.
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