From the Nova science series, a look at some of nature's perfect designs.

Pevsner described the building as, "a perfect, extremely reticent design.

The snow had reached perhaps three inches; enough to cover, but not so heavy as to warp the perfect designs of nature.

'Just come and look at these clouds - they've got to be one of Nature's perfect designs!'

Nothing was lett of my neat and perfect design but a pig pink smear.

The 100M's perfect design makes it feel paradoxically frozen in time even while it's racing down the highway.

As Steve put it, he and his wife wanted the car because "it's a magnificent custom with a perfect design."

Even my kind master could be abusive sometimes, simply because he envied my perfect design.

I always thought of it as a perfect slick design.

"This, coupled with the perceived pressures of racing against other groups, certainly led to some less than perfect experimental design."