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Butterflies and Moths, Order Lepidoptera

The name Lepidoptera means “scale wings.” Take a close look at the wings of these insects and you will see overlapping scales, like shingles on a roof. The order Lepidoptera includes butterflies and moths and is the second largest group in the insect world. Description The scaly wings of Lepidopteran insects come in two pairs and are often quite colorful.
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4 Simple Chemical Tests for Food

Simple chemical tests can identify a number of important compounds in food. Some tests measure the presence of a substance in food, while others can determine the amount of a compound. Examples of important tests are those for the major types of organic compounds: carbohydrates, proteins, and fats. Here are step-by-step instructions to see if foods contain these key nutrients.
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Reviews

A Brief History of Fire Sprinklers

The world's first sprinkler system was installed in the Theatre Royal, Drury Lane in the United Kingdom in 1812. The systems consisted of a cylindrical airtight reservoir of 400 hogsheads (95,000 liters) fed by a 10in (250mm) water main which branched to all parts of the theatre. A series of smaller pipes fed from the distribution pipe were pierced with a series of 1/2" (15mm) holes which poured water in the event of a fire.
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Advices

Hydrogen Facts - Element 1 or H

Hydrogen (element symbol H and atomic number 1) is the first element on the periodic table and the most abundant element in the universe. Under ordinary conditions, it is a colorless flammable gas. This is a fact sheet for the element hydrogen, including its characteristics and physical properties, uses, sources and other data.
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Life

Where Can I Find a List of Unaccredited Online Colleges?

Hundreds of diploma mill "schools" offer fake degrees in exchange for cash payments. Others offer a substandard education with a minimal work load. Before enrolling in any online program, make sure that it is properly accredited. Here's how. 01 of 03 Check online college accreditation status via the web.
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