When a scientific truth arises, it is so because of observational and experimental consensus.
Meanwhile, some of the observational studies don't even show any benefit from insurance.
In both stories, the detached, observational voice calmly belies the impossibility of ever keeping a job ‘strictly business.’
All the lurking about unnoticed has allowed her to sharpen her observational skills.
Lesser discrepancies were at that time regarded as falling within the limits of observational error.
He was hardly a practical astronomer in the observational sense.
This first and oldest branch is known as "observational," or "practical astronomy."
In twelve months observational astronomy had made such a bound as it has never made before or since.
It has been assumed to have the velocity of light only because that hypothesis does not conflict with observational data.
These are the palmiest days in the eventful history of physical and observational astronomy.