Ice shelves are full of fractures and fissures, explains geophysicist Kristin Poinar from the University at Buffalo. Once they split from an ice shelf, they are often geometric in shape.
Nasa has released a striking photo of a rectangular iceberg floating in the Weddell Sea off Antarctica.
As with regular icebergs, just 10 percent of its mass is visible in the picture, though the subsurface mass is would look similar to what's visible above.
An iceberg recently spotted by NASA scientists looks like it was carefully cut into a ideal rectangle, and it's getting a lot of attention because of those unexpected angles and straight lines.
The main berg, dubbed the A68 Iceberg, collided with the Bawden Ice Rise near the edge of the Larsen C Ice Shelf in May this year, causing numerous fractures.
The iceberg is believed to have broken off from the Larsen C ice shelf, where a giant iceberg the size of DE calved previous year. Larsen A collapsed in 1995, and Larsen B collapsed in 2002.
The calving of the huge iceberg reduced the size of the ice shelf by 12%.
The Larsen C ice shelf is being closely monitored by scientists after showing signs of breaking up. As climate change continues to warm temperatures at the poles, scientists are increasingly concerned that Antarctica is melting.
Hawking’s wheelchair, thesis set to be auctioned
As the disease progressed, Hawking began using a wheelchair and communicating with others using a voice-generating computer. Proceeds from its sale will go to two charities, the Stephen Hawking Foundation and the Motor Neurone Disease Association .
New Titanic will reportedly sail from Dubai in 2022
No, we're not talking about Titanic II , a totally real straight-to-video sequel to the 1997 mega-ultra-super-blockbuster . The new ship will also carry 2,400 passengers and 900 crew - almost the same as the original.