You seem to have clicked on a link to one of our old address - e.g. hwhsef.mcmaster.ca, hdsef.mcmaster.ca or basef.mcmaster.ca.
Since 2001, when the fair was renamed the Bay Area Science & Engineering Fair, we have been here at http://www.basef.ca.
In April 2011, we stopped accepting links to our old addresses.
You may wish to notify whomever it is that linked to the old address that their page needs updating.