Alaska

A landslide-triggered tsunami in Alaska’s Tracy Arm sent water and debris 1,580 feet up a mountainside in August 2025, making it the second-highest tsunami in recorded history, according to researchers who say the event showed warning signs that could help protect ships and coastal communities.

Archaeologists working at a 13,800-year-old site in interior Alaska have unearthed what may be the oldest dwelling ever found in the Western Hemisphere, along with thousands of artifacts that include the possible earliest domesticated dog bones and earliest needles in the Americas, as well as stone tools linking the site to cultures across the Bering Land Bridge.