Tubes

I initially thought this article, Return of the Vacuum Tube, was about how tubes are still being used in high-end amplifiers, but no, it is about a new version of the old ones. The researchers have found a way to embed very tiny tubes is silicon, and anything in silicon is easier to mass-produce. Although not technically a vacuum or a tube, these hybrids of old and new turn out to be faster and less prone to the cosmic rays of space. The work was done at NASA. Perhaps they'll collaborate with the nanodiamond guys and make Space Transistors.