During the last ice age, glaciers formed high in the Rocky Mountains and carved out the peaks and valleys visible today. Recreating the landscape and life forms of this era of the last great ...

7 billion years ago during the Precambrian Era. 0 billion years old, making them among the oldest rocks found in the United States. 6 billion years ago, massive volumes of magma pushed into these ...

Watch Wednesday, April 15, 2026 at 8 p.m. on KPBS 2. For centuries human beings have been visiting this inspirational place.

Here’s what you’ll learn when you read this story: The Rocky Mountain chain is a fascinating geologic formation, as it (at least, at first glance) defies some basic geological rules, including that ...