1. London has the longest subway.
2. The Pacific is bigger than the continent of Asia.
3. Sunflowers can grow as tall as giraffes.
4. The largest animal is the blue whale.
5. The oldest country in the world is Iran.
6. The smallest country in the world is Vatican City in Rome.
(Are the above true? I'd like to find information about that. Would you let me know websites related to that? Thank you.)
1. Longest subway system
http://www.guardian.co.uk/world/2006/nov/21/transport.china
2. Areas of Pacific and Asia
http://www.igloo.org/wing.igloo?r0=library&r0_output=xml&r0_script=/scripts/worldref/view.script&r0_pathinfo=/%7Bd3c0089c-96a7-45d8-bc6b-caa14523dcac%7D/Country%20Profiles/other/pacifico
http://en.wikipedia.org/wiki/Asia
3. Sunflowers, giraffe heights
http://www.sunflowernsa.com/all-about/default.asp?contentID=67#48
http://www.curator.org/legacyvmnh/weboflife/kingdom/p_chordata/ClassMammalia/ClassMammalia/OrderArtiodactyls/giraffe.htm
4. Largest animal
http://animals.howstuffworks.com/mammals/question687.htm
5. Oldest country world
You'll find several different answers for this question. This is the one I favor.
http://answers.yahoo.com/question/index?qid=20061102111214AAnoYlU
6. Smallest country
http://geography.about.com/cs/countries/a/smallcountries.htm