Evolution of the human brain, what is evolution? Evolution is change over time in the genetic characteristics of various species over successive generations. These...

Paleontology is the study of the history of life on Earth by using fossils. Fossils are the remains of plants, animals, fungi, bacteria, and...

Viruses are microscopic parasites, generally smaller than bacteria. They have difficulty reproducing and surviving outside of a carrier body. Viruses are generally known as...