Find Green Grain Gradient stock video, 4K footage, and other HD footage from iStock. Get higher quality Green Grain Gradient content, for less—All of our 4K video clips are the same price as HD. Plans ...

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

Carl Hagenbeck believed that animals should be housed in habitats that mimicked their natural environment. Earlier, he'd followed the same guiding philosophy when exhibiting Indigenous people in ...

Coral bleaching happens when corals lose their vibrant colors and turn white. But there’s a lot more to it than that. Coral are bright and colorful because of microscopic algae called zooxanthellae.