How the Aurora Borealis and Aurora Australis Work


How the Aurora Borealis and Aurora Australis Work Sara Winter/iStock/Thinkstock
How the Aurora Borealis and Aurora Australis Work Sara Winter/iStock/Thinkstock

It wasn't too long ago that humans thought the polar lights were signs from the afterlife. Thanks to a 19th century Norwegian, we now understand that they are a fascinating interplay with Earth's magnetic field and wind from the sun.