It involves no mechanism. It's an optical illusion created using still structure. When you are mobile it shows effect.
मानव सत्यापन
Grand Canyon National Park: Women of Grand Canyon
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Grand Canyon NP: Planning for Your Canyon Hike
3,640 views
Grand Canyon NP: Straight River Corridor
3,365 views
Grand Canyon NP: Over River, View of Lava Chuar
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Hilarious Moments of Life Compilation
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More Than A View - Grand Canyon In Depth
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GCNP: Humpback Chub Translocation to Shinumo Creek
3,335 views
Grand Canyon National Park: Beavertail Cactus
3,315 views
Grand Canyon National Park: Split Rock Waterfall
3,339 views
Hilarious Prank Fail
3,340 views
Grand Canyon National Park: Spring Wildflowers
3,493 views
Surfing Fun Time
3,423 views
Nature and a White Gazeebo
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Grand Canyon NP: Springtime in Grand Canyon
3,358 views
Best Funny Try Not to Laugh Compilation
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Grand Canyon NP: Sunset from Mather Point
3,356 views
Grand Canyon NP: Pearce Ferry Take-out/ Rapid
3,327 views
Grand Canyon National Park: Cacti and Pollenators
3,344 views