This article was previously published in the Pennsylvania Association of Housing & Redevelopment Agencies (PAHRA) Monitor (Spring 2014-15). It is reprinted here with permission. The “common rule,” 24 ...

An elephant at the Berlin Zoo can use her trunk to peel bananas, an unusual behavior she engages in only when conditions are ripe. By Emily Anthes Pang Pha is an elephant of discriminating taste.

This review focuses on the factors that determine the molecular weight of polyhydroxyalkanoate (PHA), an aliphatic polyester synthesized by bacteria for carbon and energy storage. PHA is a polymer ...