1. Canyons are carved by rushing rivers over millions of years! Most canyons are formed through a process called erosion. As a river flows over the same path for millions of years, its rushing water and tumbling rocks slowly carve deeper and deeper into the stone like a giant saw.

2. The Grand Canyon is so big you can see it from space! The famous Grand Canyon in Arizona is a staggering 277 miles (446 kilometers) long, up to 18 miles wide, and over a mile deep—so gigantic that astronauts can spot it looking down from Earth orbit!

3. Walking down into a canyon is like traveling back in time. Because canyons are carved deep into the Earth, the rock layers at the very bottom are the oldest, while the layers near the top are the newest. Scientists can read millions of years of Earth's history just by looking at the colorful rock walls!

4. Some canyons are carved by moving sheets of ice. Not all canyons need rivers! Some stunning canyons, like Yosemite Valley in California, were carved out by massive, slow-moving glaciers of ice during the last Ice Age, leaving behind steep, U-shaped cliffs.

5. The deepest canyon in the world is in Peru. While the Grand Canyon is famous for being huge and wide, the Colca Canyon in Peru is more than twice as deep, plunging over 10,000 feet (3,200 meters) from the rim to the river below!

6. Giant California condors rule the canyon skies. Canyons create updrafts of warm air that let huge birds glide effortlessly. In places like the Grand Canyon, you can spot rare California condors—magnificent birds with giant wingspans stretching up to 9.5 feet (nearly 3 meters)!

7. Hidden waterfalls and secret pools hide inside narrow slot canyons. Some canyons are so narrow you can touch both sides with your hands at the same time! These slot canyons are carved out of soft sandstone by flash floods, creating secret, shadowy pathways filled with hidden pools of water.