This is my favorite food group. That is all.

The Water Cycle by Thor's Outdoor Science Academy featured on PBS

There are over 2,000 known minerals in the world. Usully about a dozen new minerals are discovered every year around the world; And, if you discover a new one, you get to name it, however it is quite taboo to name it after yourself.

We are the last surviving human species on Earth. However, 70,000 years ago there were 4 or 5 different human species all coexisting on Earth together, including our own.

Prized for its taste and food preservation qualities, rock salt has played an important role in human civilization as well as modern languages.

Sedimentary rocks are one of the main three types of rocks that make up The Rock Cycle here on Earth. The other two are igneous and metamorphic, but sedimentary rocks are the only kind of rock you can find fossils in.