Your site is not laid out very well. That is likely the reason for a high bounce rate.
The oversized words and colored words embedded in the content makes it hard to read the articles. In general, colored text within content denotes a link, but these are not links.
No offense intended, but I find your site and page layout hard to read. I would also hit the back button.
Take a look at some successful tutorial sites and you will see that they are laid out much differently.
"It's inexcusable for scientists to torture animals; let them make their experiments on journalists and politicians." -Henrik Ibsen