21.   As more and more hydrogen is drawn into such a cloud, it is compressed by gravitational force to high density, high pressure and high temperature.

22.   Boulton said he and his partners were bringing their franchise to eight high density areas with, among other things, large corporate populations and a supportive political climate.

23.   After the star explodes, the core collapses to extremely high densities, which could be the force liberating the quarks.

24.   But cells with a high density of DNA are known as aneuploids.

25.   But he said the high raccoon population caused a host of problems -- and high density made the animals more susceptible to diseases like rabies.

26.   But then the owner razed the land for a high density development and the parents were unable to raise enough money to buy the property.

27.   But their levels of high density lipoproteins, or HDL, the cholesterol carriers that protect against heart disease, were low.

28.   Even a modest decline in the spawning population could spell trouble for the birds, because it takes a high density of crabs to make the eggs accessible.

29.   Explosives are often made of materials with high densities.

30.   For decades they have tried to use lasers to rapidly compress nuclear fuel pellets to such high densities that their atomic nuclei fuse, releasing nuclear energy.