is one cigarette a day bad for you Many people think smoking only on the weekends or at parties harmless, but doctors warn there is no safe amount of tobacco. Find out how even occasional smoking damages your heart Smoking and Chronic Lung Disease:

Bruce Graham made an architectural breakthrough called tubular design. The Sears Tower (now named the Willis Tower) is built of nine tubular columns, which hold up the weight of the center tubes and allowed the building to beat physics and become the worlds tallest building

Kodros , (corresponding author), Christine LOrange, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA Katelyn ODell, Jeffrey R

The cigarette butts casually littered on San Franciscos busy streets are easily swept into storm drains or directly into the ocean or bay, harming marine life

They go for the very low price of 50 Chinese yuan [$6.99] per 10-pack carton