life

1 2 3 10

Presentation on theme

Sharks (lat. Selachimorpha) is a superorder of cartilaginous fish comprising eight teams, twenty families and about 350 species. Members of the superorder widely distributed in all seas and oceans, there are also freshwater sharks. Most species belong to the so-called real predators, some species, particularly whale, and giant deep-sea sharks, eat plankton.

For many millions of years before the planet appeared the first man, ruler of the prehistoric seas was a shark. The power of evolution sowed on Earth, countless forms of life that could not stand the severe tests and disappeared one after another, as the shark continued to exist. One prehistoric era is succeeded by another, have any amphibians, reptiles, birds, and mammals – the shark continued to exist. Pterodactyls – the winged reptile for millions of years plied the skies, disappeared from the face of the Earth. Dinosaurs-Triceratops, Brontosaurus, allosaurus and many other “saurus”, it is important chestvovali on our planet died out, leaving no trace. As the shark continued to exist.

About 20 million years ago in the sea scoured a huge Stingray, weighing over 100 pounds, and more than 25 different species of sharks, including sharks, reaching 36 meters in length. The length of these monstrous sharks was Opredelenie their huge teeth. Some of the teeth found in California, weighing 340 grams each and reach 15 centimeters in length, and seven – and ten teeth are quite common. They are triangular in shape and closer to the teeth of modern great white sharks that do not exceed 5-6 inches now with a body length of shark of 12 meters (maximum length). These teeth belonged to the ancestor of the modern great white shark the carcharodon, in huge quantities inhabited the seas. When they were first found in the seventeenth-century scientists, naturalists believed that this fossil bird tongues or teeth of serpents. They could not imagine that this shark’s teeth, and ascribed them to the mythical animal. Continue reading

Environmental problems of the White sea

White sea belongs to the basin of the Arctic ocean and represents a huge reservoir polutoratonny. Seas of this type are relatively few. Similar characteristics possess Black sea, the Mediterranean, the Baltic and Hudson Bay. White sea is the smallest of them. It is divided into two unequal parts – the Northern (outer) and southern (inner). They are joined by a relatively narrow Strait, also called the throat.

In modern times, few bodies of water that don’t pollute and the White sea is no exception. Anthropogenic pollution of the White sea began immediately after the occurrence on its shores of a man and eventually became so significant that the consequences can be observed today.

In a relatively short era of navigation, some areas of the bottom, especially in small lips, where it is convenient to stand during the storm, were so covered with coal slag, which still have not recovered destroyed the bottom biocenoses. These environmental problems of the White sea cannot be considered modern, though harm from them not less.

The woodworking industry has no less impact on the ecology of the White sea. Wastes at sawmill one keretsky industrialist, was filled in the Strait between the two Islands on which it is located.The forest industry is one of the key environmental problems of the White sea. Continue reading

The aquarium design

People living in big cities, accustomed to the fact that each day is filled with stress and fuss. Frantic pace of life in the concrete jungle every day more and more alienate us from nature. If you want to bring into your life a piece of natural tranquility and peace of the living world — place the aquarium in the interior of your home or office. Motley paints the inhabitants of this amazing water world will make the gray urban everyday life more fun, improving your emotional state.

Marine aquarium the new time — this is not a regular element of Aqua . Experts say high-quality design of the aquarium contributes to the improvement of emotional state, getting rid of depression, mood elevation. The water of the aquarium moistens the air, making the atmosphere more healthy.

If you start from the ancient Chinese teachings of Feng Shui, moving water has a powerful energy to influence a person’s life — it gives abundance, material and spiritual prosperity. Well-designed marine aquarium . filled with clear water and populated fun healthy fish, no doubt, affects the welfare of his master, pulling good fortune, bringing a positive mood. Unique aquarium design interior in accordance with all your requirements, be able to highlight your individuality. Exclusive design,embodying the most daring desires, will make a good impression on family, friends or work colleagues. Do not waste the chance given to you the unique technical capabilities of our century — place it in your home or office a element of Aqua design, representing a little island of nature in a busy world cold city walls. Beautiful and unusual saltwater aquarium in the interior, which is a fairytale world with many mysteries that will allow you to take a fresh look at life. Continue reading

1 2 3 10
Goldfish breeding story
Goldfish History of goldfish breeding Asia has at least a Millennium and originated from children's hobby to collecting in which the housing was offered and developed in cages, in pens,…

Continue reading →

Tackle and methods of fishing
Fishing is the main topic of conversation 80% of the male population. Discuss fish biting, what kind of attachment she now takes and in what places. The word "fishing" can…

Continue reading →

Dangerous inhabitants...
The rest of the sea – the dream of almost every holiday maker! The Eastern part of Russia are used and forced to rest on the coast of the sea…

Continue reading →