Scientists on the mission team say the size and rounded shape of the pebbles in the rock indicate they had been transported and eroded in water.

BBC: Curiosity Mars rover beams images of ancient streambed

The working prototypes of this digital camera have hundreds of lenses instead of one and bend the basic elements found in a digital camera into a rounded shape.

CNN: High-tech camera acts like a bug's eye

Closed, it has a long ovular shape with rounded edges, a silhouette that makes it look kind of like an enlarged eyeglasses case.

ENGADGET: Sony S1 and S2 hands-on Hands-on

Or, dare I say it, whatever glitch it was in the system that allowed Apple to patent a rectangular shape with rounded corners.

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For example, Apple has been granted a patent on a mobile device which is rectangular in shape and has rounded corners.

FORBES: Is This Apple Abusing The Patent System Or The USPTO Abusing It?

Built by connecting a number of standard modules each measuring 384mm both in height and width and weighing eight kilograms, the Diamond Vision OLED is scalable and can be designed to flexibly form a certain size or shape, even against rounded surfaces.

ENGADGET: Mitsubishi's huge, modular OLED display set to go on sale worldwide on September 21