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Jet stream
A narrow current of strong winds high up in the Earth’s atmosphere. The jet stream directs the movement of weather patterns around the world.

Jet stream
Image courtesy University of Illinois WW2010 Project
Word of the day
Oak Ridges Moraine >> The Oak Ridges Moraine is a unique geographic landform in southern Ontario. Its 160 kilometres of river valleys and rolling hills were formed by advancing and retreating glaciers 12,000 years ago.