Well, Dayhawk ISN'T saying what periods she imagines her two classes shared with me happen in. So I'm going to write a scene assumed to happen at WHATEVER time Kim Tisdale and Alipang Havens are in biology.
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"Can someone tell me," asked Mr. Narahito, "what the difference is between social animals and gregarious animals?" Not seeing any hands raised by students familiar to him, the biology teacher--a dogmatic believer in absolute governmental control of all education--grudgingly called on the upstart homeschooler who was raising his hand. "Mr. Havens."
Alipang stood up. "Sir, the term 'social' is most suitably applied to the 'social insects'--ants, termites, and bees. What distinguishes these types is the complete absence of individuality: a single specimen _cannot_ survive alone, they _need_ the combined contributions of the whole hive or nest. The only way they could be any more interdependent would be if they were compound organisms like sponges. Gregarious animals are creatures which have _some_ ability to fend for themselves independently, but which prefer and benefit by the close proximity of others of their kind. Many kinds of birds, like seagulls, crows and geese, are gregarious; and of course there are herbivorous mammals like deer and bison, or carnivores like lions and wolves. You could say that there is a gradual shading of meaning from social to gregarious; thus, penguins are not so bound in collective behaviors as ants are, but in the Antarctic winter they need each other for--"
"Thank you, Mr. Havens," Narahito interrupted. "I saw 'Happy Feet' too."
From a seated position, Alipang replied, "Sir, I saw 'March of the Penguins' first."