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.
   Great: The Great Barrier Reef is a large and vast coral reef: at  2000km long, it is the largest coral reef in the world.   Barrier: The Great Barrier Reef is a barrier reef. A barrier reef  is one which runs parallel to the shore, separated by a channel of  water.  Reef: The Great Barrier Reef is a coral reef.   When people say reef, they imply coral reef.. Corals, and other things like coralline algae, are what form reefs.     Corals are Cnidarians, the same ph â¦ ylum as anemones and jellyfish. Being a Cnidarian, a coral contains nematocysts to sting and capture prey in their tentacles.