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.
Those lines are a great example of wrinkles caused by the actions of groups of muscles of the face. Other examples are the fine lines alongside the eyes (crow's feet) and the horizontal lines we see on our forehead when we raise our brows.