Which U.S. State Joined The Union Last?

Did You Know!

Alaska has places where the ground can permanently preserve human footprints for decades.

In parts of Alaska with ice-rich permafrost, footsteps compress the soil in a way that freezes solid and resists erosion. As long as the permafrost stays intact, those impressions can remain visible for 20–40 years or more—essentially turning the ground into a slow-motion historical record of where people once walked.

It’s one reason Arctic researchers can sometimes retrace human activity long after structures are gone.