A S (Gus) Griffin

Re round earth, this one is slightly more child-friendly: http://earthsky.com/1999/es990302.html
 
It may be of interest how I got this in about thirty seconds -
 
1.  Went to www.askjeeves.com.
 
2.  Typed in plain English - Why is the Earth round?
 
3. AskJeeves then offered this re-wording: "Why are Earth and other bodies in space round?"
 
4. I clicked on it and got the page above.
 
Askjeeves is a wonderful resource for all those questions kids love to throw you with - and no need to try to think like a search engine.
 
 
Gus