 was born. Today, about 35% of U.S. restaurants offer some version of Mr. Cardini's salad on their menus. Deborah Rodriguez, CBS News. And I thought that salad was named after a Roman emperor. And finally, scientists in South Africa have ascertained that some termite mounds there have been continuously inhabited for 34,000 years, making them the world's oldest termite mounds. So happy birthday to them, too. I'm Vicki Barker, CBS News.