1) Orchids are one of the largest families of flowering plants, with over 25,000 species.

2) The fastest land animal is the cheetah, capable of reaching speeds up to 70 miles per hour (113 kilometers per hour) in short bursts.

3) The Earth's core is hotter than the surface of the Sun.

4) Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly edible.