How long does a migraine usually last?

How long does a migraine usually last?

Migraines are disabling headaches that most likely stem from problems with the nerves and blood vessels in the head. Migraine headaches typically last from 4-72 hours. They may occur as often as several times a week to only once a year. People who have migraines are called migraineurs.

Is north America and south America one continent?

Depending on the convention and model, some continents may be consolidated or subdivided: for example, Eurasia is most often subdivided into Europe and Asia (red shades), while North and South America are sometimes recognized as one American continent (green shades).

What do the gills of a fish do?

Lungs take oxygen from the air and send carbon dioxide out through the air. Gills take oxygen out of the water and let water carry away carbon dioxide. Fish force water through their gills, where it flows past lots of tiny blood vessels.

Do dogs get cavities in their teeth?

Pets, like their human owners, can get cavities. However, cavities are relatively rare in dogs because dogs’ diets generally are not high in decay-causing sugars. Veterinary dental experts have noticed a mild rise in the incidence of cavities among dogs fed sugary treats.

What do you call a group of frogs?

A group of finches is called a charm. A group of foxes is called a skulk or leash. A group of frogs is called an army or colony. A group of geese is called a flock, gaggle or skein.

How much did the Dutch pay for Manhattan?

According to the document by Pieter Janszoon Schagen our People (ons Volck), Peter Minuit and Dutch colonists acquired Manhattan in 1626 from unnamed American Indian people in exchange for trade goods worth 60 guilders, often said to be worth US$24

What are bones made up of?

Bone is made mostly of collagen, a protein that is woven into a flexible framework. Bone also contains calcium phosphate and calcium carbonate, minerals that add strength and harden the framework. The combination of calcium and collagen gives the bone its strength and flexibility.

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.