Category : Hobbies & Science : Society & Culture & Entertainment

How to Purify a Metal

Hobbies & Science
Metals are rarely found in a pure state. They are typically found inside mineral ore in their natural state, or as part of a metal alloy when purchased commercially. If you wish to have pure metal, you must have a method to extract the metal you want from the ore or alloy, leaving the unwanted mater

How to Operate a Planer

Hobbies & Science
A planer is considered by most woodworkers not only easy to operate, but also to be one of the most indispensable tools for furniture making in the wood shop. It has one job and one job only. That is to plane the flat side of either rough wood or milled boards down to a specified size. The use of a

Carnivorous Caterpillars

Hobbies & Science
The great majority of caterpillars are vegetarian. Out of the 160,000 or so known species of butterfly and moths, only around 1 percent are though to eat meat, primarily soft-bodied insects and spiders. Some species, such as the carnivorous caterpillars of Hawaii, have developed mimicry techniques t