21.   The article debunks the notion that life exists on Mars.

22.   No official estimates existed on the number of potential claimants.

23.   My husband was right that nothing could exist on this planet.

24.   Remains of these baths still exist on the south side of the Pantheon.

25.   The offline system ensures that a copy of every module sent offline exists on a primary and a secondary media item before the online copy can be destroyed.

26.   But how many were unable to exist on their earnings without some degree of supplementation from poor relief?

27.   In some cases -- Spain and Greece for example -- the examinations were very irregular in their application and for long existed largely on paper.

28.   Jamie was moping around his flat, existing on cups of tea and stale bread toast.

29.   A number of units are already under offer and excellent opportunities exist on the remaining units.

30.   The Royal College of Obstetricians and Gynaecologists say too little data exists on the dangers of underwater birth.