Arguably, since the dawn of the solid state era the human race has been experimenting with the development of computronium, or forms of matter optimized for the processing of information. The doped silicon semiconductors that make up the CPU and much of the supporting circuitry of the computer you're using right now are variants of computronium (albeit very primitive when compared with the above link). Most circuitry as we know it today has a few limitations that we don't often think about, however. First of all, it's on the fragile side. Drop a circuit board when it's not inside a …

Scientists at the University of California-Riverside physics lab have created under laboratory conditions a most unusual form of matter: Positronium in molecular form, which is composed of discrete molecules of electron-positron (anti-electron) pairs.

Now, why they're calling these molecules I have to wonder - technically they'd be an exotic and rare form of atom and not molecule (because molecules are made up of multiple atoms). Maybe the reporter got his or her facts wrong. Still, this is definitely a breakthrough in particle physics because it represents a stable (for a couple of seconds, at least) axis of matter and antimatter in …