1.   In one experiment, laboratory rats were separated into three groups.

2.   And another new report on breast cancer this week suggests that the herb rosemary may have something to do with controlling breast cancer, at least in laboratory rats.

3.   And though the dreams of the laboratory rats turned out to be somewhat prosaic, Wilson said, this could be simply because they tend to lead boring lives.

4.   Billed as the March for the Animals, the event attracted several thousand advocates for everything from circus elephants to laboratory rats.

5.   But Ms. Booker said she had no interest in being treated like a laboratory rat.

6.   But scientists did not dare to report the results of their fertility studies which showed that nicotine was, if anything, making laboratory rats more randy.

7.   But studies show crack changes the brain structure of laboratory rats, hurting their ability to learn, bond and handle stress.

8.   Carefully timed doses of X-rays permitted the severed spinal cords of laboratory rats to regenerate in experiments whose findings were reported Tuesday.

9.   Even laboratory rats eat something better than trail mix.

10.   Fifty-two of the youngest laboratory rats died unexpectedly midway into the flight, forcing ground-based research teams to adjust some of their experiments.