80s Films: Bill Murray, post-SNL, pre-Groundhog. Think spaghetti.?

Questions

What Greek runner of 5 bc is said to have run 241 km in 48 hours to summon help for Athens?

What has approximately 1/4 pound of salt in every gallon?

What healthful practice is chewing an acacia twig a substitute for in India?

What herb seed can be either black or white, & yields an oil that resists turning rancid?

What holiday is celebrated on july 14th in French Polynesia?