Weekly Science Quiz

Artist’s rendering of the MESSENGER spacecraft  orbiting Mercury. NASA’s MESSENGER probe successfully began orbiting Mercury earlier thi...

The Arctic tern is an elegant flyer performing an annual  long-distance migration between the Arctic and the  Antarctica. Photo: Carsten E...

Surprisingly, only about one sixth of all the matter in the universe can be accounted for through observation. For example, when astronomer...

Scientists can have a rather odd sense of humor. Take, for example, the chemistry professor demonstrating to his class how strong a beaker f...

Several ammonite forms from Ernst  Haeckel’s  Artforms of Nature. Ammonites are an extinct group of marine invertebrates classified as c...