The entire first half of the mural was a textbook in alien biology.

A noted scientist specializing in ancient alien theoretical biology.

She grinned at him, knowing this realization would make them reassess their basic comprehension of the alien biology.

Just think of it: a whole planetful of alien biology, literally light-years away.

His alien biology gave him an endurance no human could hope to match.

In fact, the chemical risks these people take with alien biology astounds me.

Everyone else was caught up in the mysteries of alien biology.

You can't apply human judgments to alien biology.

An anxious biologist asked, his countenance telling without words how vital he deemed the chance to see alien biology up close.

I'm a busy woman, and alien biology is not my field.