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November 21, 2019

Sand Art That Is Older Then A Century

Sand painting is a form of art that consists of pouring colored sands, powdered pigments from minerals or crystals, and pigments from other natural or synthetic sources onto a surface to make a fixed or unfixed sand painting.

Unfixed sand paintings have a long established cultural history in many social groupings around the entire globe, and are often temporary, ritual paintings prepared for religious or healing ceremonies. It is also referred to as dry painting.

Dry painting is practiced by Native Americans in the Southwestern United States, by Tibetan and Buddhist monks, as well as Australian Aborigines, and also by Latin Americans on certain Christian holy days.

In the sand painting of southwestern Native Americans, the Medicine Man (or Hatałii) paints loosely upon the ground of a hogan, where the ceremony takes place, or on a buckskin or cloth tarpaulin, by letting the colored sands flow through his fingers with control and skill. There are 600 to 1000 different traditional designs for sand paintings which are known to the Navajo. They do not view the paintings as static objects, but as spiritual, living beings to be treated with great respect. More than 30 different sand paintings may be associated with one ceremony.

The colors for the painting are usually accomplished with naturally colored sand, crushed gypsum (white), yellow ochre, red sandstone, charcoal, and a mixture of charcoal and gypsum (blue). Brown can be made by mixing red and black; red and white make pink. Other coloring agents include corn meal, flower pollen, or powdered roots and bark.

The paintings are for healing purposes only. Many of them contain images of Yeibicheii (the Holy People). While creating the painting, the medicine man will chant, asking the yeibicheii to come into the painting and help heal the patient.

Drawing On A Grain Of Sand

Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. The composition of sand can be very versatile, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz.

The second most common kind of sand is calcium carbonate, an example can be aragonite, which has mostly been created, over the past half billion years, by various forms of life, like coral and shellfish. It is, for example, the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years like the Caribbean.

The study of individual grains can reveal much historical information as to the origin and kind of transport of the grain. Quartz sand that is recently weathered from granite or gneiss quartz crystals will be angular. It is called grus in geology or sharp sand in the building trade where it is preferred for concrete, and in gardening where it is used as a soil amendment to loosen clay soils. Sand that is transported long distances by water or wind will be rounded, with characteristic abrasion patterns on the grain surface. Desert sand is typically rounded.

People who collect sand as a hobby are known as arenophiles. Organisms that thrive in sandy environments are psammophiles.

Strangest Thing To Eat While You Are Pregnant

Pregnancy is the fertilization and development of one or more offspring, known as an embryo or fetus, in a woman’s uterus. During pregnancy, there can be multiple gestations, as in the case of twins or triplets. Childbirth usually occurs about 38 weeks after conception; in women who have a menstrual cycle length of four weeks, this is approximately 40 weeks from the start of the last normal menstrual period. Human pregnancy is the most studied of all mammalian pregnancies. Conception can be achieved through sexual intercourse or assisted reproductive technology.

An embryo is the developing offspring during the first 8 weeks following conception, and subsequently the term fetus is used until birth. In many societies’ medical or legal definitions, human pregnancy is somewhat arbitrarily divided into three trimester periods, as a means to simplify reference to the different stages of prenatal development. During the first trimester there is the highest risk of miscarriage (natural death of embryo or fetus). During the second trimester, the development of the fetus can be more easily monitored and diagnosed. The beginning of the third trimester often approximates the point of viability, or the ability of the fetus to survive, with or without medical help, outside of the uterus.

In the United States and United Kingdom, 40% of pregnancies are unplanned, and between a quarter and half of those unplanned pregnancies were unwanted pregnancies. Of those unintended pregnancies that occurred in the US, 60% of the women used birth control to some extent during the month pregnancy occurred.

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