Tinbergen and his students studied other variations of this effect.

It studies variations in language based primarily on geographic distribution and their associated features.

Both of these characteristics have been used to study such variations over long spans of time.

Mendel, who is known as the "father of modern genetics", was inspired to study variation in plants.

This 100-year coverage is a unique resource for studying temporal variations in the universe.

Ney was interested in studying variations of air temperature with altitude.

In recent decades the advances of molecular biology have provided researchers with the ability to study genetic variation more directly.

The entire performance thereby had choreographic focus, and one could study countless variations upon a few basic movement themes.

It is used in biological anthropology and bioarchaeology to study human phenotypic variation.

Its purpose was to study variations in the solar output as a possible factor in climate prediction.