In 2007, researchers at the University of CaliforniaâDavis determined that our Solar System was fully formed at 4.568 billion years ago. They did this by determining the age of stony materials from the asteroid belt.
When to see a doctor. See your doctor immediately if you experience the signs and symptoms of migraine with aura, such as temporary vision loss or floating spots or zigzag lines in your field of vision. Your doctor will need to rule out more-serious conditions, such as a stroke or retinal tear.
2. Environmental Environmental allergies are one of the main causes of dark circles around the eyes. The allergies cause congestion that increases the blood flow to the nose. As the skin under the eyes is delicate, it creates a purple tint. It also enlarges the blood vessels around your eyes and creates a dark tint.