21.   As a research biologist who spends his life testing hypotheses, Klar said, he is all too familiar with going down blind alleys.

22.   Baylin and his colleagues first tested their hypothesis on the Von Hippel-Lindau gene, a tumor-suppressor gene that has been linked to kidney cancer.

23.   A leading expert on bacterial infections is preparing to test the hypothesis.

24.   But no one had tested this hypothesis until September, when researchers completed the first study to compare breast cancer risk factors of lesbian and heterosexual women.

25.   But researchers were slow to test the hypothesis on humans.

26.   But the Newcastle team tested this hypothesis and found it wanting.

27.   Certainly students could excel on topics they understand from collecting data and testing hypotheses.

28.   During the video game, they observed the electrical activity in her brain to test a hypothesis that certain brain waves are associated with navigational and spatial learning.

29.   Instead of testing hypotheses with experiments, discovery science involves generating big databases of information, without always knowing in advance what the data will be used for.

30.   Kelly is working on a specimen, the penis of a freshly deceased rat, testing a hypothesis about how the baculum might work.