tobacco during the civil war Coffee and Trading - A Truce. Union and Confederate soldiers trading goods. 19th century American illustration by Edwin Forbes Stock Photo Camp Life

Participants in the inserts-only group reported more frequent thinking about the benefits of quitting, which makes sense given that the inserted content described these benefits

Cannabis and Heart Attack Smoking cannabis could increase the risk of a heart attack in certain populations, including young adults

References & Further Reading Protection Times Data Table EPA Insect Repellents Principles, Methods & Uses M Debboun & others Chemical Invisibility Cloaks Thwart Mosquitos C&EN Magazine Mushroom Alcohol Molecule of the Month Mosquito photo: photochem_PA, Creative Commons BY licence

Timothy Beck Werth is an experienced editor, journalist, and product reviewer with 15 years of experience