There are actually quite a few people who believe the earth is flat. B.o.B is probably the most famous.
Here's an article that will describe it much better than I can, hope it helps!
http://theconversation.com/curious-kids-why-is-the-earth-round-80311
ok thank you@lizk
has helped me, so I have understood more clearly ,,!!
No problem! Glad I could help!