21.   However, because water vapor in the atmosphere also emits microwaves and the cosmic radiation is very faint, it can only be studied from balloons and satellites.

22.   In contrast to the enthusiasm over seed implants, some doctors think external radiation has been undervalued.

23.   Is radiation to blame for so many deaths?

24.   Its radiation is featureless.

25.   Kaufman told WSB-TV that her doctors have said the tumor was extremely small, that it had not spread, and that radiation will not be necessary.

26.   Officials said the radiation released was not a threat to public health, but the reactor was closed for nearly a year.

27.   Officials admit there is some uranium in the bomb shell, but stress that the only way the radiation could be dangerous is if the bomb was ingested.

28.   Only in small, bubblelike regions around the stars would their radiation be able to ionize the hydrogen, creating regions free of the cosmic fog.

29.   Other spinal cord researchers called the Kalderon-Zvi results interesting, but expressed caution about concluding that the radiation was responsible.

30.   Radiation is energy produced when tiny pieces of unstable atoms go flying off.