It's taken roughly five months, but a massive iceberg has separated from Antarctica's Pine Island Glacier. According to NASA's Earth Observatory, the estimated size of this iceberg, named B-31, is around 660 square kilometres (33 km long by 20 km wide) – a city-sized block of ice that has slowly migrated away from the continent, and is now floating out to sea. Take a look at some massive icebergs afloat in the oceans. Photo: File photo of an iceberg floating near a harbour in the town of Kulusuk, east Greenland August 1, 2009. (Photo by Bob Strong/Reuters)

A demonstrator throw a firebomb during clashes with Turkish riot police officers in Istanbul, Turkey, Friday, May 1, 2015. The government assigned 30,000 police officers backed by helicopters as workers and demonstrators determined to defy a government ban, tried to march to iconic Taksim Square, where 35 people were killed during May Day celebration in 1977. (Photo by Emrah Gurel/AP Photo)

A fuel rod is inserted into a reactor vessel inside the No. 1 reactor building at Kyushu Electric Power's Sendai nuclear power station in Satsumasendai, Kagoshima prefecture, Japan, July 8, 2015. Kyushu Electric Power Co started loading uranium fuel rods into a reactor on Tuesday, marking the first attempt to reboot Japan's nuclear industry in nearly two years after the sector was shutdown following the 2011 Fukushima disaster. (Photo by Issei Kato/Reuters)

A snowboarder wears a protective cushion at the Thaiwoo ski resort in Zhangjiakou close to venues for the Winter Olympics Beijing 2022, Hebei province, China, November 20, 2021. China hopes hosting the Games will springboard the country towards becoming a winter sports destination and will help deliver on a target set by President Xi Jinping to get 300 million Chinese involved in winter sports, with an aim to build a 1 trillion yuan ($157 billion) industry. (Photo by Thomas Peter/Reuters)

In this image released on October 1, Russian model Irina Shayk is seen onstage during Rihanna's Savage X Fenty Show Vol. 2 presented by Amazon Prime Video at the Los Angeles Convention Center in Los Angeles, California; and broadcast on October 2, 2020. (Photo by Jerritt Clark/Getty Images for Savage X Fenty Show Vol. 2 Presented by Amazon Prime Video)

Two displaced Tigrayan girls giggle next to their mother, left, as their photograph is taken outside the Hadnet General Secondary School which has become a makeshift home to thousands displaced by the conflict, in Mekele, in the Tigray region of northern Ethiopia Wednesday, May 5, 2021. The Tigray conflict has displaced more than 1 million people, the International Organization for Migration reported in April, and the numbers continue to rise. (Photo by Ben Curtis/AP Photo)

People protest getting evicted from land designated for a Petrobras refinery, at a settlement coined the “First of May Refugee Camp”, referring to the date people moved here and set up tents and shacks to live in during the new coronavirus pandemic in Itaguai, Rio de Janeiro state, Brazil, Thursday, July 1, 2021. (Photo by Silvia Izquierdo/AP Photo)

A member of staff at Morton & Eden holds an extremely rare early Islamic gold coin on Thursday September 12, 2019, which is expected to fetch £1.4m at auction in London. Measuring a 20mm across, about the size of a modern £1 piece, it is one of the world's rarest and most treasured Islamic gold coins from the first dynasty of Islam, the Umayyad gold dinar dated 105h (723AD). (Photo by Victoria Jones/PA Images via Getty Images)