In theory, the building blocks of life are possible with a more expansive code than three-letter codons. New work shows that 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 origin of life, on Earth or elsewhere.
While observing fearful memories take shape in the brains of fish, neuroscientists saw an unexpected level of synaptic rewiring.
A 3D digital model of a “minimal cell” leads scientists closer to understanding the barest requirements for life.