Hyperborean cycle

Okay kiddo, imagine if you were living in a really, really cold place, where it was winter all year round. That's kind of what the Hyperborean cycle refers to - a time when the Earth was colder and the ice covered more of the land.

See, the Earth goes through cycles of climate change over a really long time, and we have evidence that about 2.5 million years ago, it got much colder than it is now. During this time, big sheets of ice, called glaciers, covered much more of the land than they do today.

Scientists call this the Hyperborean cycle because the word 'Hyperborea' comes from Greek mythology, and was said to be a magical land filled with ice and snow. It's kind of like when you read a storybook about a far-off kingdom that's always snowy and icy like winter.

So when we talk about the Hyperborean cycle, we're talking about how the Earth goes through changes over a really, really long time - like millions of years - and how that can make it colder and change the way the planet looks. But don't worry, we're not in a Hyperborean cycle now, and the Earth is not getting much colder anytime soon.