This fact-filled Guide explores the ocean from the coastal zones to the frozen poles, the deep sea to the open ocean.

UNESCO: Associated Schools Programme (ASPNet)

He says cities are getting hit on all sides, declining local and state revenues combined with frozen credit markets and the prospect of a deep national recession.

NPR: Economy Hurts California's Cities

They were thoroughly miserable when they toured here two years ago - I still have vivid memories of Chris Gayle standing at Chester-le-Street, frozen to the spot at first slip with his hands thrust deep into his pockets.

BBC: Jonathan Agnew column

Doctors used the eggs produced from her first fertility treatment, which had been deep frozen for 18 months.

BBC: NEWS | UK | England | West Midlands | Clinic creates frozen egg twins

Vastitas Borealis, the area that Phoenix has landed in, gets covered in a metre-deep layer of frozen carbon dioxide.

ECONOMIST: Space exploration

Vastitas Borealis, the area that Phoenix has landed in, will be covered in a metre-deep layer of frozen carbon dioxide.

ECONOMIST: Exploring Mars

Only 2.5% of the world's water is fresh and of that, 99% is frozen in icebergs or hidden deep underground.

UNESCO: Education

While most meals for economy class are deep frozen, for business and first-class passengers food is freshly prepared on the day.

CNN: Frankfurt Airport in numbers

He says the problem with mislabelling happens more with "wet fish" - fish which is not fully deep-frozen but which is only kept cold on ice.

BBC: Mislabelled fish slip into Europe's menus