Goldin, Augusta R

Discusses the possibilities of generating electrical power from the world's oceans and of extracting natural gas from ocean kelp farms.

Describes the behavior of different kinds of ducks and, in particular, discusses how all ducks use preening to keep their feathers dry.

Explains how a spider spins its web and the many uses of that strong silk.

Discusses what salt is, where it is found, and some of its many uses; includes a simple experiment for growing salt crystals.

A simple explanation of hair - how it grows, why dampness affects it, why its characteristics cannot be changed, how strong it is, and how it stretches.

Directs attention to the countless small renewable energy sources on every continent and to the proven technologies already producing power in cost-effective operations.

Describes the habits and behavior of ducks emphasizing the physical characteristics which prevents their "getting wet.".

Describes the habits and behavior of ducks, emphasizing the physical characteristics which prevent their getting wet.