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Exercising In Space

What did astronaut Shannon Lucid like least about her six months on Space Station Mir? The daily exercise. 'It was just downright hard,' she wrote in Scientific American (May 1998). 'I had to put on a harness and then connect it with bungee cords to a treadmill.' The harness and cords kept her feet on the treadmill. They also provided resistance ...

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ExercisingInSpace
Physics

What Makes a Frisbee Fly?

If you have ever been to the park or the beach, you've probably seen one of these plastic discs flying through the air. We're not talking about a UFO, we're talking about the Frisbee, more commonly ... Continue reading

Frisbee
Geology

Rock, Mineral, Crystal, or Gemstone?

Rocks and minerals are all around us and used every day, perhaps without us even being aware of them. Besides making up the solid, supporting surface of the earth we live and move upon daily, rocks ... Continue reading

RockMineralCrystalGemstone
Biology

How Blood Clots

Scabby knees and bruised shins are as much a part of growing up as climbing trees. Minor injuries from paper cuts to skinned elbows are nothing to worry about for most people, because the blood's ... Continue reading

BloodClots
Engineering

X-Ray Astronomy vs. Medical X-Rays

It's natural to associate the X-rays from cosmic objects with an X-ray from the doctor's office, but the comparison is a bit tricky. A doctor's X-ray machine consists of two parts: an X-ray source at ... Continue reading

XRayAstronomyvsMedicalXRays

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!