What is a jet stream?

Aircraft traveling from North America to Europe last week, neared the speed of sound over ground at times. A jet stream made these flights truly exceptional.
Rain & isolated storms move in Wednesday before clearing out for the holiday weekend

What is the jet stream and how does it work?

What Is A Jet Stream? - WorldAtlas

PPT - The jet stream PowerPoint Presentation, free download - ID:2042960

Jet stream - Wikipedia

Jet Streams and their influence on aviation - AERTEC

Australia getting hammered by two jet streams

Jet Stream: current of rapidly moving air

Weatherwatch: What makes the jet stream get stuck?

Climate graphic of the week: Jet stream pattern and 'heat domes' fuel soaring temperatures around globe

From record cold to record warmth, why are we so warm?