Scientists from the California Institute of Technology have created an artificial neural network (or a “tiny brain,” in the words of the lead scientist) from DNA strands that interact with biochemical inputs.
The artificial neurons of this network can take incomplete inputs, interact with each other, and come up with a complete conclusion. This is what the human brain does on a much more complex scale. It’s also a principle scientists have used for computing and robotics.
The building block of the Caltech neural network is double-stranded DNA molecules with loose ends. These loose ends then receive the input of single-stranded DNA that binds with the double-stranded DNA, which, through DNA strand replacement, releases an output DNA strand from the double-stranded DNA.
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