Is an opossum a rodent?

Is an opossum a rodent?

Opossums are not rodents. They are an order unto themselves, part of the “infraclass” known as marsupials. The label distinguishes marsupials from placental mammals, such as rodents.

Why does the sun lighten our hair and darken our skin?

Melanin is a pigment found in your skin and hair cells that gives each its color. It does seem weird that the sun bleaches our hair and darkens our skin. This mostly has to do with hair being dead and skin being alive. The sun bleaches and destroys the melanin in your hair giving you lighter hair.

How do transition lenses work?

Transitions lenses contain special patented photochromic dyes that cause the lens to activate, or darken, when exposed to ultraviolet rays from sunlight. When the UV light diminishes, the lenses fade back. As light conditions change, the level of tint adjusts, offering the right tint at the right time.

Who was the first president of all 50 states in the US?

Dwight D. Eisenhower was the first President of all 50 states. Hawaii, the 50th state, entered the union on August 21, 1959, during the Eishenhower’s second term. Eisenhower was also the first President to hold a pilot’s license.

How do snakes hear if they dont have ears?

When people and most animals hear, sound waves strike the eardrum and go to the inner ear, which is sensitive to the sound waves or vibrations. Snakes do not have eardrums, but their skins, muscles, and bones carry the sound waves to the inner ears.

What is the percentage of salt in ocean water?

The concentration of salt in seawater (salinity) is about 35 parts per thousand. Stated in another way, about 3.5 percent of the weight of seawater comes from the dissolved salts; in a cubic mile of seawater, the weight of the salt (in the form of sodium chloride) would be about 120 million tons.

How much of the earth’s atmosphere is made up of nitrogen and oxygen?

It is primarily composed of nitrogen (78%) and oxygen (21%) with only small concentrations of other trace gases. Nearly all atmospheric water vapor or moisture is found in the troposphere, so it is the layer where most of Earth’s weather takes place.

What nation produces the most vanilla?

The majority of the world’s vanilla is the V. planifolia species, more commonly known as Bourbon vanilla (after the former name of Réunion, Île Bourbon) or Madagascar vanilla, which is produced in Madagascar and neighboring islands in the southwestern Indian Ocean, and in Indonesia.