Mysterious blue swirl lights up the night sky over Alaska

Mysterious blue swirl lights up the night sky over Alaska and mesmerises onlookers - but what caused the strange sight?

Mysterious blue swirl lights up the night sky over Alaska and mesmerises onlookers – but what caused the strange sight?

Mysterious blue swirl lights up the night sky over Alaska and mesmerises onlookers – but what caused the strange sight? … Continue reading Mysterious blue swirl lights up the night sky over Alaska and mesmerises onlookers – but what caused the strange sight?