He was perhaps the most famous scientist of the twentieth century.

a regular flower; a regular sea urchin

In “Panel Recommends Cautious Approach to Meningitis B Vaccine ” (June 25), regarding the use of the vaccines in adolescents and young adults, I was quoted saying there were “red flags with safety,” but my overall point was that safety questions remain despite the fact that prelicensure studies found no increased risk of serious complications.

whether we may be more incommodated with a resty horse, or with a tired one