For every known particle there’s an antiparticle. This is one of the greatest ideas of the 20th century. But be careful not to meet your anti-person! Share this:FacebookTwitterGooglePinterestLinkedInEmailTumblrPrint One Response iqbal ahmed September 2, 2014 | Reply your work is v good Leave a Comment Click here to cancel reply. Name * Email (will not be published) * Website Comment Notify me of follow-up comments by email. Notify me of new posts by email.