They'll hold their fire until the rats begin to leave the ship.

So rats may begin to see more use as genetic research subjects.

After Douglas' death in 1921, rat fancy soon began to fall back out of fashion.

So he moved slowly, stamping, while the rats began climbing his legs.

A moment later she heard the rats in the walls begin to stir.

But the researchers also found that at 21 days, the rats began to show the effects of chronic stress.

But as they were talking, the rat began to squiggle greatly.

Then the rats began to stir again, timid at first, stopping when he would make a sound.

When the rats began to associate eating with the possibility of pain, they soon developed seriously high blood pressure.

The black rat, who had watched all this with interest, now began to climb down the fragment of wall and away.