21.  If their preliminary assessments are correct, distant Europa has a warm inner core and liquid water, two key conditions favorable to life.

22.  In contrast, Malin and Edgett said the new evidence suggested that liquid water might lie as close as a few hundred feet down.

23.  In liquid water, this twisting leads to molecular friction and heating.

24.  In very cold weather, outdoor pets need a shelter, extra food and a source of liquid water.

25.  It is not quite manna from heaven, but NASA scientists Thursday announced the first discovery of liquid water in an object from space.

26.  It will hunt for planets warm enough -- but not too warm -- to hold liquid water and possibly life.

27.  Its atmosphere was found to be so thin that any liquid water would quickly vaporize.

28.  Left on the kitchen counter on a hot summer day, the ice turns to liquid water.

29.  Liquid water is almost certainly present on the two new planets, in the form of droplets in clouds that are falling like rain, Marcy said.

30.  Liquid water is also one of the essential ingredients for life as we know it.