Case file · Cosmic event
Hiawatha crater found under the ice
In 2018, radar surveys revealed a 31 km impact crater buried under the Hiawatha Glacier in north-west Greenland.
2018 CE · 78.73, -66.60 · status: official
The account
It was first suspected to be very young, fuelling speculation about a link to climate swings at the end of the Ice Age; later dating placed the impact around 58 million years ago.