Finding new ways for fast and efficient processing and transfer of data is one the most challenging tasks nowadays. Elementary spin excitations - magnons (spin wave quanta) - open up a very promising direction of high-speed and low-power information processing . Magnons are bosons, and thus they are able to form spontaneously a spatially extended, coherent ground state, a Bose-Einstein condensate (BEC), which can be established independently of the magnon excitation mechanism even at room temperature.
Our understanding of the individual and population properties of very low mass stars is quickly evolving. We now have data sets providing precise periods, temperatures, luminosities, and variabilities for hundreds of M dwarfs and the time is ripe to form a comprehensive and detailed picture of the bottom of the main sequence. I will review recent advances in our understanding of late M dwarfs as well as early stellar L dwarfs from an observational perspective.