1.   This is occurring spontaneously, but not at a rate which significantly affects the dense clusters further north.

2.   But in recent years, astronomers have realized that collisions are not uncommon within dense clusters of stars.

3.   But the oddest part of the conservation debate is that many people, especially the environmentally minded, call for putting populations in dense clusters to save land elsewhere.

4.   Dense clusters of low residences, broken only by narrow streets, extend inward.

5.   Faces begin to emerge from the dense clusters of petals.

6.   Its elongated stems form dense clusters and it spreads not through runners but by seed dispersal.

7.   Last year, when they were transplanting young garlic, they noticed that a dense cluster of long tender roots had formed.

8.   Perhaps celebrities possess some internal radar like bats that enables them to hunt down dense clusters of paparazzi.

9.   But it was evident from the dense cluster of decomposing bodies in the pit behind him that there were dozens.