Curators assumed that changes in the forms of artefacts reflect some natural process of progressive evolution.

The term for progressive evolution is anagenesis, though this does not necessarily include the idea of improvement.

"This is not what would be expected from progressive evolution," the scientists said of their findings.

The progressive evolution of the style can be seen in the art of Qizil and Dunhuang.

The zero energy building concept has been a progressive evolution from other low-energy building designs.

The progressive evolution of animal and range sciences has generated increasingly complex opportunities for research, teaching and outreach.

In the progressive evolution of catapults, the next major improvement after the scorpio was the cheiroballistra.

Beyer used the 19th century scientific methods of progressive evolution and migratory diffusion as the basis for his hypothesis.

The difference between thes two is marked by the progressive evolution of Magic.

Horses have become the classic example of progressive evolution because their bush has been so unsuccessful.