Graphene’s material properties are staggering; as a material it almost seems too good to be true, which explains why the media interest in it is so high. It is the thinnest known material in the universe and the strongest ever measured; for a crystalline structure it is elastic and can stretch up to 20% of its length; it is a very efficient electrical conductor and at room temperature it can sustain current densities six orders of magnitude higher than that of copper; its charge carriers have the highest intrinsic mobility; it has the best thermal conductivity of any material; and it is the most impermeable material ever discovered.