CLOSE SHOWS SCHEDULE TOPICS SHOP THIS DAY LISTS AUDIO FACEBOOK TWITTER INSTAGRAM GOOGLE FOURSQUARE YOUTUBE EMAIL UPDATES FOLLOW WATCH WANT FULL SIGNING IN YOUR TV TV PROVIDERS CHECK SOON FAQS ADVERTISEMENT VIKINGS ANCIENT ALIENS AMERICAN PICKERS PAWN STARS OPEN ARTICLE PLAY VIDEO SHARE GRAND CANYON EXPLORE THE GEOLOGICAL HISTORY OF THE GRAND CANYON THE SEVEN NATURAL WONDERS OF THE WORLD PRINT CITE AUTHOR STAFF WEBSITE NAME PUBLISHED ACCESS DATE PUBLISHER INTRODUCTION NORTHERN THE WORLD SIZE COLORFUL MEASURING MILES LONG UP TO MILES WIDE MILE THE CANYON WALLS ROCK LAYERS REVEAL TIMELINE OF EARTH LOCALE HUMAN USE OCCUPATION RUINS ARTIFACTS INHABITANTS DATING NEARLY THE EARLY EXPEDITIONS SENT GOVERNMENT FEDERAL PROTECTION FOREST RESERVE NATIONAL NATIONAL PARK STATUS VIDEO ROOSEVELT ARCH CREATION YELLOWSTONE THE MAJESTIC VISTA GEOLOGICALLY LAYERS ANCIENT ROCKS EXPOSED THE WALLS TIMELINE OF EARTHS HISTORY THE CREATION THE NATIONAL PARK TODAY GRAND CANYON NATIONAL PARK ACRES TO 5 VISITORS TAGS ARIZONA GRAND CANYON NATIONAL PARKS FACT ACCURACY IF YOU SOMETHING LOOK CONTACT RELATED CONTENT GALLERY TOPIC FRANCISCO CORONADO LONDON BRIDGE HOOVER DAM SCIENTISTS NEWS 10 THINGS YOSEMITE NATIONAL PARK BORAX BIRTH SERVICE MOBILE ADVERTISE CORPORATE INFORMATION AROUND THE WORLD EMPLOYMENT OPPORTUNITIES PARENTAL GUIDELINES PRIVACY POLICY TERMS OF USE COPYRIGHT POLICY CHOICES CLOSED CAPTIONING DIGITAL LIFETIME VICELAND EDUCATION HISTORY MILITARY HISTORY PLANET BIOGRAPHY CRIME INVESTIGATION US COPYRIGHT TELEVISION NETWORKS ALL RIGHTS RESERVED LOVE HISTORY SIGN SIGN ME UP INSIDE NEWSLETTER HISTORICAL PLEASE ENTER VALID EMAIL ADDRESS SUBMITTING YOUR EMAILS YOU CAN OPT OUT ALMOST YOU WILL ACTIVATION ONCE CLICK DO NOT ENSURE DELIVERY ADDRESS BOOK PREVIOUSLY CHANGED ALREADY SUBSCRIPTION PROBLEMS PLEASE TRY AGAIN LATER