21.   Looking for information on a popular topic?

22.   One popular topic was the ideal degree of connection between artist and machine.

23.   Photographs of the Ramseys, especially JonBenet, are regularly splashed on the covers of supermarket tabloids, and the killing remains a popular topic on radio talk shows.

24.   So, of course, The Age Thing has become a popular topic.

25.   Since news of her shopping spree became public in July, she has become a popular topic on the opinion pages of local newspapers.

26.   Taxes have always been a popular political topic.

27.   Stealing signs was a popular topic last week.

28.   Such speculation is an increasingly popular topic among planetary scientists.

29.   The subject of tires is always a popular topic in the garage area, especially before the Darlington and Rockingham races.

30.   Then, the twin towers collapsed, and the most popular topics suddenly became Nostradamus, World Trade Center and Osama bin Laden.