It looks like a giant striped candy, but this humbug is in fact an ice block spotted in the Antarctic by Norwegian sailor Oyvind Tangen. It reminded him of something he ate as a child, so he took a picture of it.
Tangen was on board a research vessel 1,700 miles south of Cape Town and 660 miles north of the Antarctic. As his journey progressed he found more, and these are his pictures.
Most ice in the Antarctic is formed as snow falls on the ice sheet and is compressed.
Tiny bubbles in the ice make it appear white. However, occasionally the bubbles get squeezed out, and this gives the ice a blue appearance.
Some stripes form as the ice melts and refreezes. Others are filled with dust and soil, and appear brown, black or yellow. Some are filled with algae and appear green.
Very cool. RM