Posted in: Scientists
Scientists have divided the ocean into five main layers. These layers, known as “zones”, extend from the surface to the most extreme depths where light can no longer penetrate. These deep zones are where some of the most bizarre and fascinating creatures can be found. As we dive deeper into these largely unexplored places, the temperature drops and the pressure increases at an astounding rate. The following chart lists each of these zones in order of depth.
Epipelagic Zone - The first of these layers is known as the Epipelagic Zone and extends from the surface to 200 meters (656 feet). It is in this zone that most of the visible light exists.
Mesopelagic Zone - Next is the Mesopelagic Zone, extending from 200 meters (656 feet) to 1000 meters (3281 feet). The mesopelagic zone is sometimes referred to as the twilight zone or the midwater zone. The light that penetrates to this depth is extremely faint. It is in this zone that we begin to see the twinkling lights of bioluminescent creatures. A great diversity of strange and bizarre fishes can be found here.
Bathypelagic Zone - The next layer is called the Bathypelaic Zone. It extends from 1000 meters (3281 feet) down to 4000 meters (13,124 feet). Here the only visible light is that produced by the creatures themselves. The water pressure at this depth is immense, but a surprisingly large number of creatures can be found here. Sperm whales can dive down to this level in search of food. Most of the animals that live at these depths are black or red in color due to the lack of light.
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Anabolic steroids, also sometimes called anabolic androgenic steroids are natural and synthetic drugs that model naturally produced testosterone. Anabolic steroids are often used because they promote cell growth which helps the growth of tissues (particularly muscle). There are many different types of anabolic steroids and they each have their own combination of anabolic and androgenic properties to make them unique and better suited for different results.
The term anabolic steroids refers to the process of building muscle or other body mass including bone and other tissues. While this is good, anabolic steroids are not a miracle drug. The side effects associated with anabolic steroids include increased cholesterol levels, kidney and liver problems and elevated blood pressure. There are also non-life-threatening side effects of anabolic steroids. These include acne, increased body hair, cessation of natural production of hormones, premature baldness and deepening of the voice.
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The history of anabolic steroids cannot be explained without looking back to when the very beginnings of testosterone were first discovered. It’s been widely accepted since ancient times when the testicles were known to be required for male sexual characteristics and development. Then, in the mid-19th century, scientists discovered that removal of the testicles from birds caused a disappearance of male sexual properties.
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Posted in: Scientists

Above is a clickable image showing the layout of earth’s tectonic plates, as scientists have them outlined today. Plate margins are the edges of the plates, where all the awesome power of nature is released in earthquakes and volcanoes! To go back to the page you were just reading, click on that part of the map. To find out more about each of the three types of plate boundaries, click on them!