Seashells are very strong, but chalk is easy to break. Both are made from calcium carbonate crystals. So why the difference? Materials scientists have found the answer.
Toronto -
Chalk art is a treat for the residents of Toronto with several artists around the downtown core working on pavement. Jo is one of those artists on Queen Street West in front of Eaton Centre.
Italian street artist Vera Bugatti creates a Halloween mural at the world-renowned Sarasota Chalk Festival in Florida in 2010. The 2014 version of the annual festival, scheduled for Nov. 10-17, has been moved to Venice, Fla.
