They're polar

Usage examples of extremes.

At Bologna, as at Naples, the two extremes of society are corrupt, while the middle classes are respectable, and the depository of virtue, talents, and learning.

Reputed to be the hottest place on earth, it is a land of geographic extremes, where gray mountains suddenly rise like fortress walls from broad rocky grasslands, and oceans of sparsely vegetated lowlands marry vast seas of sand.

Like the homogeneity that follows when a collection of disparate metals is heated to a smooth molten liquid, the significant differences between the forces as we now observe them were all erased by the extremes of energy and temperature encountered in the very early universe.

Perturbative methods can, at best, give skeletal insights, since the extremes of energy, temperature, and density require precision analysis.

This was unjust, but there is no doubt he made use of every illustration to disgust or encourage his son that his neighbourhood afforded him, and did not spare his brother, for whom Richard entertained a contempt in proportion to his admiration of his father, and was for flying into penitential extremes which Sir Austin had to soften.

The discovery of the affinity between the two extremes of the Royal British Oak has made me thrice conservative.