Didn't want to go to school." Bullying is defined as negative behavior repeated over time against the same person.
VOA: special.2010.04.22
But she wrote that women's roles decreased over time as the Cherokee people accepted the values of the larger American culture.
VOA: special.2010.04.09
It gets worse over time. The disease affects a small area of cells in the middle of the brain.
VOA: special.2009.04.07
He told her his ideas about how species evolve over time -- what he called the transmutation of species.
VOA: special.2009.02.25
Readers can better understand how informed consent and the question of morality in medical experiments have changed over time.
VOA: special.2010.07.21
Volcanic activity broke the large island into pieces that came to the surface of the sea over time.
VOA: special.2009.12.16
Charles Darwin developed the theory of how living things develop from simpler organisms over long periods of time.
VOA: special.2009.02.25
Rosalyn Schanzer brings to life the clues that suggested to Darwin that living things evolve, or change,over time.
VOA: special.2009.02.27
Studies have shown that over time, most humans need eight to eight and a half hours of sleep for the best health.
VOA: special.2009.08.26
The number of mutations over time helped the team estimate when the duplications in soybeans took place.
VOA: special.2010.02.02
Calhoun said that for a long time he had believed that the dispute over slavery -- if not settled -- would end in disunion.
VOA: special.2009.03.26
At the same time,courts have ruled against any publicly supported celebrations of one religion over another.
VOA: special.2009.12.24
Its reddish color and changes in brightness over time make the planet an unforgettable sight.
VOA: special.2010.07.28
Some experts suggest taking pictures of moles and dating the images to compare over time.
VOA: special.2010.07.06
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