The Arctic is a vast, remote, and mystical place. With all its ice, snow, and frozen ground, it helps keep the Earth’s climate in balance; effectively acting as a reservoir for cold. However, anthropogenic climate change has caused the Arctic to warm significantly over the past several decades; in fact, twice as fast as the global average. The impacts of this warming are critical, and the consequences of rapid glacier retreat, sea ice melt, and permafrost thaw cascade through the delicate Arctic ecosystem; upsetting the Arctic energy balance and fuelling positive feedback loops that can further accelerate warming. But what happens in the Arctic doesn’t stay in the Arctic. Arctic change has a global reach, causing the sea-level rise and extreme weather events in distant parts of the world, and highlighting the importance of understanding and tackling this issue.