The old men had told him that no man should travel alone in the Yukon when the temperature is sixty degrees below zero.

VOA: special.2010.05.01

They form when the air temperature is about fifteen degrees below zero Celsius.

VOA: special.2010.01.05

They form when the temperature is about five degrees below zero.

VOA: special.2010.01.05

The temperature often dropped to sixty degrees below zero Celsius.

VOA: special.2009.02.11

Looking down 10 stories over Ground Zero, Marine Corporal Jonathan Rist said he hoped the new construction going on below would not remove every last shred of the buildings destroyed in the terrorist attacks of September 11,2001.

VOA: standard.2009.08.01