When a small bridge in western Switzerland collapsed 2,000 years ago ... In the late 1960s, the splintered remains of a wooden bridge across the Thielle River were discovered along with iron ...

The Charles Kuonen Suspension Bridge in Randa, Switzerland, is the third-longest hanging bridge for pedestrian use in the world. It spans 494 meters and, upon its opening in 2017, was the ...

Editor’s note: A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here. An intriguing object my husband and I saw during our ...