THE fascinating diversity of mollusc shells is showcased in these striking photographs of part of the shell collection at the Natural History Museum in London. The images are taken from Interesting ...

Ammonites are a tale of two textures. The prehistoric cephalopods were composed of fleshy soft tissue (the living bit of the animals) and hard external shells, which, according to a paper published ...

These sharp images taken with NASA's Hubble Space Telescope reveal at least five shells of stars surrounding a brilliant quasar at the heart of a giant elliptical galaxy. The image at left shows the ...