But these revelations, one after another, help to construct an image of a society under threat from the secret actions of its own supposed protectors.

Now scientists have used genetic sleuthing to construct an image of that flower - to help us understand both plants and the insects that developed alongside them.

One format approach proposed for interstellar messages was to use the product of two prime numbers to construct an image.

The designer can choose to visually construct an image and the software will generate the necessary code.

Photographs, rather than drawings, of individual features are used to construct an image of a suspect.