Metals have a crystal structure. But they're not one big crystal, they're lots of small crystals called grains. The size of the grains affects the physical properties of the metal, like hardness, ...

Thick dark smoke billowing from Bruny Island this afternoon. Image / Howard Tapping Thick dark smoke has been seen billowing into the air off the southern tip of Bruny Island this afternoon as ...

State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Clean ...