Emma Morano is an Italian supercentenarian who is, at the age of 116 years, 169 days, the world's oldest living person, and the last verified living person to have been born in the 1800s. Born on Nov. 29, 1899, Morano is believed to be the last person living born in the 19th century.
The coral reefs existing today began growing as early as 50 million years ago. Most established coral reefs are between 5,000 and 10,000 years old. Although size can be a good indicator of the age of a coral reef, it is not a certain indicator.he coral reefs existing today began growing as early as 50 million years ago. Most established coral reefs are between 5,000 and 10,000 years old. Although size can be a good indicator of the age of a coral reef, it is not a certain indicator.
Because of strict environmental restrictions, coral reefs generally are confined to tropical and semi-tropical waters. Coral reef locations around the world. Download. Reef-building corals cannot tolerate water temperatures below 64Â° Fahrenheit (18Â° Celsius).Many grow optimally in water temperatures between 73Â° and 84Â° Fahrenheit (23Â°â29Â°Celsius), but some can tolerate temperatures as high as 104Â° Fahrenheit (40Â° Celsius) for short periods.Most reef-building corals also require very saline (salty) water ranging from 32 to 42 parts per thousand.ecause of strict environmental restrictions, coral reefs generally are confined to tropical and semi-tropical waters. Coral reef locations around the world. Download. Reef-building corals cannot tolerate water temperatures below 64Â° Fahrenheit (18Â° Celsius).