The samples were analysed blind by a single observer.

Nothing really has changed, yet a single outside observer has somehow, however briefly, made it come to life.

Conservation laws require a single observer and a single inertial frame.

Instead the image was like bas-relief, as it would have appeared to a single observer.

As a result, he suggests, we have to abandon the idea that any single observer can compile a complete description of the universe.

From the viewpoint of any single unaccelerated observer, mass can neither be created or destroyed, and special relativity does not change this understanding.

One negative point, however, did strike me - not a single observer claimed to have seen a fireball descend on land.

They haven't put a single observer on either ridge.

A cosmos can have no more solid foundation than a single observer's coherent explanation.

We stand in awe of the scene, much like the single observer that the artist has painted into the foreground.