Prevent aggravation of canker sores by avoiding: 1  Abrasive foods or those that can stick in the mouth (potato chips, for example) 2  Spicy, acidic, or hot foods and drinks.  Traumatizing the ulcers (through harsh contact with toothbrush bristles, for example).
A new species of spider -- Cerbalus aravensis -- is the largest of its type in the Middle East, scientists in Israel say. Credit: Photo by Yael Olek, courtesy of the University of Haifa.
The Phidippus audax is often called the Daring Jumping Spider or Bold Jumping Spider. It is a common jumping spider in North America. It is among the largest of the jumping spiders. Adults grow to be between 1/2 inch and 3/4 of an inch. They are usually black with white stripes and spots as adults.