What ended the Mayans?
For more than 500 years, the Mayans were the richest and most advanced civilization of the American continent. They occupied most of the Yucatan Peninsula and Central America, as well as the territories that today belong to Guatemala, Belize and Honduras. But in the year 800 they began a slow collapse, and two centuries later most of their temples and cities had become ruins. What was the reason? A study published today in Science reveals that the decrease in rainfall played a key role in the disaster. Scientists have long suspected that the decline of the Maya was due to periods of drought. But, until now, no one knew how much rain the Mayans had lost before their society disintegrated
The humanism
Humanism is a European intellectual, philosophical and cultural movement closely linked to the Renaissance whose origin is located in the fourteenth century in the Italian peninsula (especially in Florence, Rome and Venice) in personalities such as Dante Alighieri, Francesco Petrarca and Giovanni Boccaccio. They look for Classical Antiquity and take up the ancient Greek humanism of the Golden Age and maintain its hegemony in a good part of Europe until the end of the 16th century, when it was transformed and diversified at the mercy of the spiritual changes provoked by the social and ideological evolution of Europe , fundamentally to collude with the principles advocated by the reforms (Lutheran, Calvinist, etc.), the Catholic Counter Reformation, the Enlightenment and the French Revolution of the eighteenth century. The movement,...
How does a tornado and a hurricane form?
A tornado begins with a severe storm called a supercell. A supercell can last longer than a common storm. The same property that keeps a storm active also gives origin to most tornadoes. The wind that joins the storm begins to swirl and forms a funnel. The air inside the funnel rotates more and more rapidly and generates an area of very low pressure, which sucks more air (and possibly objects) into itself. The severe storms that produce tornadoes are formed from the encounter between cold and dry polar air, and humid tropical air. This is very common in an area of the United States known as the Callejón de Tornadoes. In the same way, the atmosphere needs to be very unstable. The
Why do we cry?
Tears Did you know that ... TEARS taste salty because it contains 1% 25 of sodium chloride? The rest of the composition is 98% water and 1% protein and glycoproteins. Experts in dacriology (medical branch that studies crying) point out that there are many myths about crying, and that for example newborns at birth do not shed a single tear, only scream and kick but are unable to cry ...
Why do we applaud?
IN TIMES OF THE ROMANS PEOPLE WERE ALREADY HIRED TO APPLAUD IN SOME ACTS Today we have the habit of applauding to express our support or rejoicing before something, but this tradition is very old ... The Greeks expressed their approval to the works of theater cheering and applauding. The Romans snapped their fingers, applauded and waved the togas of their togas, or shook special strips that were distributed to the public for that purpose. In the seventeenth century, whistling, trampling and applauding was the right thing to show approval to a show. Such practices were also observed in the churches for a time, but when the clergy banned these manifestations, coughing, humming or blowing through the nose.
The mysterious petradox stone
An Oopart (Out Of Place Artifact in Spanish) Out of place artifact is a term applied to dozens of prehistoric objects found in several places around the world that, given their level of technology, are completely at odds with their age determined based on characteristics physical, chemical and / or geological tests. Ooparts are often frustrating for conventional scientists and a delight for adventurous researchers and people interested in alternatives to scientific theories. In 1998, electrical engineer John J. Williams discovered what appeared to be an electrical connector protruding from the ground. He started to dig and found that the triple plug had been embedded in a rock ...