(National Park Service) "Double Arch," a popular geologic feature in Rock Creek Bay within Utah's Glen Canyon National Recreation Area, as shown in an undated photo before its Aug. 8, 2024, collapse.

On Aug. 8, Double Arch crumbled into Lake Powell. While scientists say all arches have a finite lifespan, Double Arch’s collapse was likely accelerated by weather, environmental and human stressors.

This photo provided by the National Park Service shows the Double Arch, center, after the collapse, Friday, August 9th, 2024, in Rock Creek Bay of the Glen Canyon National Recreation Area, Utah.

This combination of photos provided by the National Park Service shows the Double Arch intact in Rock Creek Bay at the Glen Canyon National Recreation Area, Utah, left, and after its collapse ...

This photo provided by the National Park Service shows the Double Arch, center, after the collapse, Friday, Aug. 9, 2024, in Rock Creek Bay of the Glen Canyon National Recreation Area, Utah.

Double Arches Collapse Utah This combination of photos provided by the National Park Service shows the Double Arch intact in Rock Creek Bay at the Glen Canyon National Recreation Area, Utah, left, and ...

SALT LAKE CITY (AP) — A common line of questions has emerged from visitors to Utah's Arches National Park in the week since an iconic rock arch at Lake Powell known as the "Toilet Bowl" collapsed.

SALT LAKE CITY (AP) — A common line of questions has emerged from visitors to Utah's Arches National Park in the week since an iconic rock arch at Lake Powell known as the "Toilet Bowl" collapsed.

SALT LAKE CITY - A common line of questions has emerged from visitors to Utah’s Arches National Park in the week since an iconic rock arch at Lake Powell known as the "Toilet Bowl" collapsed.

This combination of photos provided by the National Park Service shows the Double Arch intact in Rock Creek Bay at the Glen Canyon National Recreation Area, Utah, left, and after its collapse ...