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Plate Tectonics

In geologic terms, a plate is a large, rigid slab of solid rock. The word tectonics comes from the Greek root 'to build.' Putting these two words together, we get the term plate tectonics, which refers to how the Earth's surface is built of plates. The theory of plate tectonics states that the Earth's outermost layer is fragmented into a dozen or ...

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PlateTectonics
Astronomy

A Map of the Sky

Niagara Falls, the Grand Canyon, Old Faithful... we know they're spectacular sites, but how did we find out about them? Early explorers took the time to map out the United States and as a result, you ... Continue reading

AMapoftheSky
Biology

Botrytis: The Noble Rot

Gray mold is a common disease of small fruits (e.g. strawberries) and flowers (e.g. petunias) in warm, humid weather. It is caused by the fungus Botrytis cinerea, which produces huge numbers of ... Continue reading

BotrytisTheNobleRot
Physics

The Doppler Effect

As any object moves through the air, the air near the object is disturbed. The disturbances are transmitted through the air at a distinct speed called the speed of sound, because sound itself is just ... Continue reading

TheDopplerEffect
Engineering

Sundials, Ancient Clocks

The earliest and simplest form of sundial is the shadow stick. The time of day is judged by the length and position of the stick's shadow. Some nomadic peoples still use this method for timekeeping. ... Continue reading

SundialsAncientClocks

The Handsome Betta Fish

BettaFishThe Betta fish is possibly the most handsome tropical fish out there. We say handsome because the male of the species is the bigger and more exotic one. Referred to as the jewel of the Orient, Betta are most abundant in the shallow rice paddies of Thailand.

Male Betta have long, velvety and colorful fins, and a biting and fighting personality. They are very territorial and two male Betta in the same small area will fight each other, sometimes to death-hence their nickname, 'Siamese fighting fish'. The Betta was first described in 1846 by Valenciennes and Cuvier. The first shipment of Betta arrived in the United States in 1909 and was called Betta splendens.

Betta is classified as a fresh water fish, however in addition to standard gills that are used to extract oxygen from the water, they have a specialized labyrinth organ that allows them to breathe atmospheric air through their mouths. Betta have quite a charming personality when interacting with humans and are one of the only fish which like to be petted!