In 37 AD, the Roman emperor Tiberius sent fire engines to the port of Ostia, thinking the city was on fire. But it wasn’t a fire lighting up the city, it was a red aurora. Auroras are, in simple terms, flickering lights caused by the sun’s radiation. They are often found near the Poles and are only seen at night because their light isn’t as strong as daylight. They can, however, be seen from hundreds of miles away. An aurora around the North Pole is an Aurora borealis, also called the Northern Lights or Dawn of the North, while an aurora in the south, Aurora australis, is called the Dawn of the South. This video shows some incredible auroras caught in Finland.