11.   Lightning flashes deep in the enveloping gas clouds.

12.   Lightning flashes and thunder rolls.

13.   Lightning flashes from cloud to ground can travel nine miles or so.

14.   Lightning flashes from safely distant electrical storms are not uncommon.

15.   More lightning flashes means a more intense storm is about to strike.

16.   One lone candle had bobbed all night long on a floating end table while lightning flashes revealed the swift current tearing through what was left of his neighborhood.

17.   One lone candle had bobbed all night long on a floating end table while occasional lightning flashes revealed the swift current tearing through what was left of his neighborhood.

18.   Or the night Nicholson is driving north of Alva and sees a tornado moving through the darkness, illuminated by lightning flashes.

19.   The researchers studied lightning flashes then and found a far higher percentage than normal had a positive, as opposed to negative, charge.

20.   There, primitive organic chemicals could have grown more and more complex under the stimulus of lightning flashes until some evolved into DNA, the master molecule of heredity.