Discover how the Colorado river helped forge one of the most breathtaking natural sights on Earth, a stunning canyon almost 300 miles long and over a mile deep.

Looking at the eruption of Italy's Mount Vesuvius which destroyed the ancient Roman cities of Pompeii and Herculaneum. Vesuvius still continues to threaten a densely populated area.

From it's initial formation from a cloud of dust 4.5 billion years ago, to the first signs of life, discover the incredible story of the birth of our planet.

Astonishing geological discoveries reveal that the Sahara Desert had a dramatically different past that altered the course of human history and culminated in the biggest climate change event of the last 10,000 years.

Stretching from Alaska to New Mexico, the rockies are one of the great mountain ranges of the world. Discover how shifts in the Earth's crust helped form this rugged landscape.

The Sierra Nevada, North America's highest mountain range, contains one of the most awe-inspiring geological features on the planet: Yosemite Valley. Walled by sheer 3,000-foot granite cliffs and made from one of the toughest rocks on earth, it is home to the mighty El Capitan and iconic Half Dome. Yet how this extraordinary valley formed has been the subject of controversy for over 100 years.