The Grand Canyon is, at its maximum, 446 kilometers long, 29 kilometers wide, and 1,857 meters deep. The waters of the Colorado River began carving into the layers of the rising Colorado Plateau about 6 or 7 million years ago to reveal Proterozoic and Paleozoic rock formations dating as far back as 2 billion years ago.
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Aphonopelma chalcodes - There are approximately 30 known species of tarantula in the United States. Most species, such as the Arizona blond tarantula, are found in the warmer southern and southwestern regions of the country. The Arizona blond tarantula derives its name from the dense layer of blond hair covering the carapace, the upper exoskeleton. The size of the Arizona blond varies between 7 to 25 centimeters. Tarantulas are carnivorous and use their venomous bites to paralyze their victims.
