So if you pick an observation by a single observer at random, it will frequently be of the expanding universe, which has far more observers.

ECONOMIST: The universe, it appears, may not be alone

Ludwig single-handedly designed and built Observer, a real-time web analytics tool.

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The researchers have found, for example, that a single street lamp can affect the view of the night sky for an observer up to 200km away.

ECONOMIST: Going, going, nearly gone