1.   The researchers observed mothers and their new infants for a three-day period.

2.   Under these conditions, the researchers observed significantly higher blood levels of alcohol in the women compared with the men.

3.   Researchers observed one bird impale a rodent on a cactus.

4.   Researchers are observing the course of the disease at the cellular level.

5.   Imaging technology now allows researchers to observe the brain in action, providing insights into the diseases and objective measurements in evaluating how drugs work.

6.   In one experiment, the researchers observed the behavior of male gobies toward females that were naturally more or less colorful.

7.   It would be like assigning wives to unmarried men because researchers have observed that married men are healthier.

8.   Knowing if you are in a treatment or control group can subtly change behavior in ways researchers cannot observe.

9.   Researchers have long observed that people who are obese produce lower levels of chemical by-products associated with adrenaline and noradrenaline.

10.   Researchers also observed the behavior of customers who received the coupons while they were in the drugstores.