Detail of a mathematical proof in a blackboard written with chalk. Selective focus. This is an exclusive image and it can only be found in istockphoto. It's available in high resolution.
Price: 10
"Among the last lighthouses to be built along the Atlantic Coast is the 140-foot Sullivans Island Lighthouse, which guards the eastern shipping approaches to Charleston Harbor in South Harbor. Not accessible to the public, the triangular-shaped lighthouse "
Price: 10
"Closeup of male hand and wrist holding black gaffers tape on isolated white background. This tape is common in photography, cinematography, and set-building."
Price: 10
Detail of a mathematical proof in a blackboard written with chalk. Selective focus. This is an exclusive image and it can only be found in istockphoto. It's available in high resolution.
Price: 10