Causes of Blackouts. The most common cause of a blackout is called syncope, (âsin-co-peeâ). Syncope describes blacking out because of a sudden drop in blood flow to the brain. Usually syncope is so-called âReflex Syncopeâ. This is the cause of fainting. The blackout occurs because blood pressure suddenly drops and the brain is temporarily starved of oxygen and glucose. Although a faint can cause accidental injury, it is not dangerous of itself, provided the patient can lie down flat.
Love is evergreen. Green is everywhere. Itâs the most common color in the natural world, and itâs second only to blue as the most common favorite color. Itâs the color we associate with money, the environment, and aliens, and itâs the color of revitalization and rebirth. Letâs break down our understanding about the color green.
The most common auroral color, a pale yellowish-green, is produced by oxygen molecules located about 60 miles above the earth. Rare, all-red auroras are produced by high-altitude oxygen, at heights of up to 200 miles. Nitrogen produces blue or purplish-red aurora. The connection between the Northern Lights and sunspot activity has been suspected since about 1880.