180,000,000 years ago- Present-day continents began to form. See note below.

1773- Captain James Cook and his crew became the first men to cross the Antarctic circle.

1820- Fabian Gottlieb von Bellingshausen became the first person to spot land on the continent.

1821- John Davis became arguably the first person to land on the continent.

1823- John Weddell went the farthest south into the Antarctic, which is why the Weddell Sea bears his name.

1841- Sir James Clark Ross searched for the Magnetic South Pole.

1868- Antarctic explorer Robert Falcon Scott was born.

1872- Antarctic explorer Roald Amundsen was born.

1874- Antarctic explorer Ernest Shackleton was born on February 17 in Ireland.

1895- Carsten Borchgrevink found lichen, the first sign of plant life.

1898- Adrein de Gerlache and his crew became the first to survive an Antarctic winter.

1901-1902- Scott and Shackleton and three other men attemted to walk to the South Pole and were unsuccsessful.

1907-1909- Shackleton almost reached the South Pole on a journey of his own.

1911- Race to the South Pole! The first successful trip was led by Amundsen.

1911- A British trip to the South Pole was led by Scott. He got there second.

1912- Scott died on his way back to his ship.

1914- On August 8th, Shackleton and his crew sailed from England to Antarctica, just before World War I starts.

1914- On December 5th, the Endurance leaves the icy island, South Georgia, and reaches the Antarctic Penninsula.

1914- On December 8th, Shackleton's crew reaches the Weddell sea.

1915- The Endurance is frozen in the ice on the edge of Weddell sea.

1915- On October 27th, the Endurance gets crushed by the ice and they abandon their ship.

1915- On October 30th- November 1st, A walk across the ice to the distant land begins. The 28 men walk for less than 2 miles, then they set up Ocean Camp on the drifting ice.

1915- On November 21st, the Enduance sinks.

1915- On December 23rd - 29th, the ice drifted slowly to the north. They tried walking to the land again, leaving many personal belongings behind. They set up a Patience Camp on an ice floe.

1916- Shackleton leads a rescue effort to South Georgia Island to get help for his men.

1917- Shackleton returns home to England.

1922- Ernest Shackleton died on January fifth on South Georgia Island, at age 47, going back to Antarctica to visit.

1928- Roald Amundsen died.

Early 1940s - The first permanent settlement happened around this time.

1961- The Antarctic Treaty was signed by many nations, who pledged to use Antarctica only for scientific studies.

1980- Scientists found out that the ozone layer in the stratosphere was being polluted.

1987- The first baby was born on the continent.

1997- Small ozone holes formed over Antarctica.

2002- On March 19, an iceberg crashed and broke off of the London glacier. For more info on this subject, visit cnn.com.

To see more information on these explorers and many more, visit our Explorers page.

How did Antarctica form?

Scientist theorize that many millions of years ago, all the land in the world formed a single continent, called Pangea. According to continental drift theory, this supercontinent broke up between two hundred million and two hundred and forty-five million years ago into a northern continent, Lurasia, and a southern continent, Gondwanaland. About one hundred eighty million years ago, Gondwanaland and Lurasia also started breaking apart. The present day continents began to form and, through continental drift, started moving toward their present positions on the earth today, and that's how Antarctica became its own continent.

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