The toothbrush is an instrument consisting of a small brush on a handle used to clean teeth through tooth brushing. Toothpaste, often containing fluoride, is commonly added to a toothbrush to aid in cleaning. Brushing teeth, a common activity today, has been around for a long time. The toothbrush as we know it today was not invented until 1938. From around 3000 BC, people used anything from a ‘chew... 

The one and only animal, that was not mentioned in the Bible is the cat. Some people although say that the cat was mentioned in the original scriptures, but then deleted by some of the early writers of the Bible because they associated the cat with the Egyptians. In those days the Egyptians held the cat in high esteem, even worshiped it, and the Christians deemed the Egyptians pagans. Another opinion... 

Dolphins sleep with one eye open! They take 2-3 minute periods throughout the day to rest one half of their brain. While that half is resting, one eye is open for predators. After 2-3 minutes, the dolphin will completely wake up and continue the day, but occasionally take more 2-3 minute periods until they sleep for about 8 hours total. They need about as much sleep as humans, they just can’t sleep...