New Lightest Material

"Scientists Produce the Lightest Solid Material":

[R]esearchers at the University of Kiel recently announced the creation of the lightest solid material ever made, based on a microtube manifestation of carbon. The scientists call their material aerographite, based on the substance's ephemeral quality. Aerographite weighs under 200 micrograms per cubic centimeter, which is a mere quarter of the weight of nickel microlattices—the previous record-holder for lightest solid. Despite its light weight, aerographite is endowed with significant strength based on its microtube lattice structure.

(Via E.P.)