At last the road to more complex creatures - an amazing event in the history of the universe - began to reveal itself.

"Look what you've done, pal," I said to this intense and complex creature.

But she is a far more complex creature than the innocently sexual Vixen.

But dogs are complex creatures that thrive when under the care of a well-informed human being.

By a couple of hundred million years ago there are large plants and animals, complex creatures, dinosaurs.

My idea was that dinosaurs - being complex creatures - might have undergone some of these behavioral changes.

Yet, at the same time complex creatures were themselves selected by evolution.

This was the most complex creature it had ever imitated.

But how can cells grow and develop to form such complex creatures?

All the same, they came across as charming and complex creatures.