Ozone Layer Thickness
The ozone layer is the element in the atmosphere that protects the Earth from ultraviolet rays. Discover the thickness of the ozone layer and how it is …
Archive by category Nature
Pluto Size
Pluto is a dwarf planet noted for its striking color contrasts. In spite of its distance, the size of Pluto and some of its features are now known. Explore the …
Size of a Tornado
Tornado sizes vary with some being very small and others over 300 km an hour. The biggest one on record struck Oklahoma City in 1999. The tornado carried winds …
Pearl Sizes
Because of their rarity and beauty, only the wealthy members of the nobility of olden times were able to afford to own pearls. Today, pearl culture farms have …
What is the Biggest Star?
There may be a couple of beliefs linked to what is the biggest star known to exist. A handful may come up but many astronomers believe that some of the …