For the human subjects and their environment to simultaneously evolve, transformations throughout their surroundings are made by interactions with other agents.

Others talked about this pattern as coevolution, in which two or more life-forms evolved simultaneously to tolerate each other.

If all these things don't evolve simultaneously, there's no advantage.

In the following decades (1975-present), shōjo manga continued to develop stylistically while simultaneously evolving different but overlapping subgenres.

The Xindi are collectively a race of six different intelligent species which evolved simultaneously on the same planet (Xindus).

Instead, those scholars propose Celtic languages evolved gradually and simultaneously over a large area by way of a common heritage and close social, political and religious links.

The "sister culture" proponents, on the other hand, state that Mesoamerican cultures evolved more or less simultaneously.

The absence of ceramics by the Peruvian cultures at this time puzzled scholars, who generally thought pottery and farming evolved more or less simultaneously.

A singleton (not duplicated) gene evolves towards two beneficial functions simultaneously.

"The only way to really do that is to simultaneously evolve the terminals and the network."