Letters to the Editor

19924

A familiar side effect of marijuana smoking is increased appetite, often for sweet foods. It is doubtful that the marijuana smokers immediately rush to brush their teeth after eating “munchies.” If they smoke multiple times throughout a day, they may be constantly nibbling on sweets, leaving food lodged between teeth and gums, a fairly direct […]

19923

I have heard that whales evolved millions of years ago into their present form, including their very large brains. We humans must be relatively recent in terms of our brain structures. Are there data concerning evolutionary development in whales? Matthew KabriskyDayton, Ohio “Learning to Listen: How some vertebrates evolved biological sonar” (SN: 5/14/05, p.