A few hundred years ago, the word “moment” used to mean a precise amount of time, just like a minute equals 60 seconds. Nowadays, we just use it to describe a very short period of time, but without any hard definition. This leaves room for some ambiguity, so here are a few ways to measure

The building blocks of the universe are particles and waves. Particles, such as neutrons or atoms, come together to create bigger and more complex structures, like molecules. Put together 2 hydrogen atoms and 1 oxygen atom and you end up with a water molecule. Put many water molecules together and you have a glass of

Anagenesis and cladogenesis are the two main ways speciation occurs. One involved the slow transition of one species to another. Cladogenesis involved the separation of a species into two or more groups, with each group then becoming its own separate species.