Seismic waves bouncing off Earth's inner core traveled back faster in 2003 than in 1993, suggesting that the rotating inner core has an irregular surface or is expanding.

A plasma and annealing treatment eliminates only the metallic nanotubes that typically form along with the useful semiconducting ones, facilitating nanotube electronic manufacture.

Carbon isotope data from teeth of an early hominin reveal that its diet switched seasonally, unlike that of chimps but similar to that of later tool-using Homo species.