The basics of digital logic are pretty easy to master, and figuring out how the ones and zeroes flow through various kinds of gates is often an interesting exercise. Taking things down a level and ...

Researchers have reverse-engineered a cellular signal processing system and used it like a logic gate -- a simple computer ... some are simply following the flow of a fluid, while others ...

Seeman and his colleagues at New York University have found a clever new way to tease DNA strands into mimicking exculsive OR (XOR) logic gates ... return a 1 (see diagram).

Cool them quickly and you get an amorphous form, which provides significant resistance to the flow of electrons ... change bits that operated like a logic gate, allowing AND, OR, and NOT operations.