Why is .Trash-0 using up so much space?

Question

I want to know why it is using so much space and why what is there is hidden?

Answer 1

I'm thinking that is your trash can. If you open nautilus, right click the trash bin, and hit empty trash, its size should substantially decrease.

Of course, I'm assuming it's a folder. Am I right, or is it a regular file?

EDIT:

Less than a minute of googling later, I believe my answer is right. Optionally, delete it from the command line. But first, educate yourself and read through the top few links in this google search:

http://www.google.com/search?q=.trash-0

rm -rf .Trash-0/