Ground-based observations also reveal seasonal variations in cloud cover.

They revealed wide variations between hospitals and among surgeons within the same institution.

The interviews also revealed variations on a theme of fear.

The 2010 Atlas revealed widespread variations in outcome, quality, cost and activity, including:

Within a century of Newton's formulation, careful astronomical observation revealed unexplainable variations between the theory and the observations.

Still, the details that make up each overall score reveal wide variations.

The shields flared slightly brighter shades of red in different places, revealing small variations in the shield strength.

Research reveals several variations of the renowned musician's name.

Perusing the 19th- and early 20th-century sections of the library reveals intriguing variations of graphic style.

Autopsies of these subjects reveal odd bodily variations.