Also referred to as the midnight sun, a polar day occurs when the sun does not set for an entire day, or 24 hours. It is called the midnight sun, because the sun is often still shining at midnight. This phenomenon can occur for just one day or six months, depending on how far away from the equator a region is.
She is Europe's oldest living person and has attributed her longevity to eating several raw eggs a day. The oldest person ever to have lived was the French woman Jeanne Calment who died aged 122 years and 164 days, according to Guinness World Records.
With the death on Wednesday of 117-year-old Japanese woman Misao Okawa, an American, Gertrude Weaver, is now the world's oldest person. In fact, the three oldest people in the world, as documented by the Guinness Book of Records, are Americans. Joining Weaver, who lives in Arkansas, are Michigan's Jeralean Talley and New York City's Susannah Mushatt Jones. The three are among only four people still living who were born in the 1800s.