You often have to make quick judgments about the number of objects you encounter in the world. You might see a group of people walking toward you. It is useful to know whether there are roughly five, ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

‘Oumuamua, the first interstellar object discovered near the Earth, left us with more questions than answers. The visitor was first observed during its exit from the solar system, and the limited data ...