The silence of black

The discovery exploits a new hair analysis method that could help, in addition to police, even doctors, archaeologists and anthropologists in their research. In fact, one was created sort of "water mapping" that allows you to combine geographical areas with isotope values detected in the hair. Police forces are using this method to obtain the origin of some unidentified murder victims. Isotopes are forms of the same chemical element with different atomic weights, because they present a different number of neutrons in the nucleus (the stable isotopes are those that do not have radioactive decay). Three years ago two expected they founded IsoForensics, a company that uses stable isotope analysis to detect them Small variations of a chemical element. The team managed to map the concentrations of the stable isotopes of hydrogen and oxygen in the hair, discovering that they are a trace of those present in food and drinking water, but also in breathed...

Every atom in your body comes from a star that exploded. And the atoms in your left hand probably come from a different star than the one in your right hand. That's the most poetic thing I know about physics: you are stardust. (Lawrence Maxwell Krauss) The atom is the structure in which matter is organized in the physical world and on whose basis it is divided into fundamental elements. Multiple atoms form the molecules. While atoms are in turn formed by subatomic constituents such as protons (with positive charge), neutrons (without charge) and electrons (with negative charge). It was so called because it was initially considered the smallest and most indivisible unit of matter. Towards the end of the nineteenth century, with the discovery of the electron it was shown that the atom was actually divisible. In fact, it is in turn composed of smaller particles, to which we refer with the term of subatomic particles.Leucus (5th century BC) founded a theory according to...

Thermology studies the thermal exchanges between bodies and understands the transformations and transfers of energy between one system and another. • Temperature: temperature is an index of the degree of thermal agitation of the atoms or molecules that make up a body; it is therefore connected to the concept of kinetic energy. • Heat: heat is a way of transferring energy. There is therefore a substantial difference between the concept of heat and that of temperature. There are various methods of measuring how hot or cold a body is: • Thermal expansion: to measure how hot or cold a body is, it is necessary to resort to a phenomenon that always repeats itself in the same way, that is, thermal expansion; when heated, all bodies dilate, that is, increase their volume. • Thermoscope: instrument that exploits the phenomenon of thermal expansion and that allows you to check the temperature variations. • Thermometer: instrument that allows you to quantitatively measure the thermal st...

Hi, welcome back to the blog of " The silence of black ". Today we will deal with a topic that represents a pillar in the field of physics: " geometric optics ". Sometimes we associate and connect basic optics and geometric optics to each other, but in reality these electromagnetism branches have a concept that is anything but similar. Optics studies light radiation and associated phenomena, while geometric optics deals with those phenomena that can be described without the use of the wave concept. The latter began to spread in the early 1600s and for centuries we will see two different models of light contrast: the corpuscular model developed by Newton according to which light is a flow of microscopic particles and the wave model developed by Christiaan Huygens which in fact, from how we can deduce it from the model name, it defines light as a wave. With geometric optics we can explain: - the WAVES - the REFLECTION of light - the REFRACTION of light -...

Easter Island and the mystery of the moais A land rich in mysteries linked to the monoliths and to the many legends. Wild nature, archaeological sites and resorts Share on Facebook Easter Island, statues, mystery and nature. Photo Easter Island, also known as Rapa Nui, is immersed in the Pacific Ocean and is located off the coast of Chile. Its name is due to the fact that the island was discovered on Easter 1722 Dutch explorer Jacob Roggeveen. In the collective imagination is identified with the statues of moai, huge monolithic busts scattered throughout the territory. There are 638 of them. Despite the research carried out in recent years, their purpose is not yet known with certainty. According to some recent studies, the statues would represent indigenous tribal chiefs dead and, according to popular belief, would allow the living to make contact with the world of the dead. ADVERTISING inRead invented by Teads The mystery of the moais Some statues have on their heads a ...

Hello everyone! I'm Jacopo Antonelli Drago, the creator of The Silence Of Black. Today I would like to talk to you about Globalization. But what is globalisation? Simple, indeed very simple. The definition of globalization is: Spread on a global scale, thanks to new means of communication, trends, ideas and problems. Racism, immigration, social media all this is part of globalization. Let's talk about immigration. Do we have a practical example of this? Yes, Italy. In Italy we are seeing the struggle between Salvini and immigrants. Why do immigrants flee their lands? The reason is very simple: War. War is always present in our world. But why war? Money, world economy. In Libya there are labour camps that pay a lot of money to the owners but destroy workers. Another Italian example is a very important novel worldwide. The Newlywed Promises. Written in 1800 by Alessandro Manzoni The Promised Married Is a historical novel set in 1600. This piece has a unique peculiarity. It repre...

The God particle or scientifically called the Higgs boson is an elementary particle in the standard model. First suspected to exist in the 1960s, it is the quantum excitation of the Higgs Field, a fundamental field of crucial importance to particle physics theory. Unlike other known fields such as the electromagnetic field, it is scalar and also has a non-zero constant value in vacuum. The question of the existence of the Higgs field became the last unverified part of the Standard Model of particle physics, and for several decades, was considered the central problem in particle physics. In the Standard Model, the Higgs particle is a boson with spin zero, no electric charge and no color charge. It is also very unstable, decaying into other particles almost immediately. It is a quantum excitation of one of the four components of the Higgs field. The latter constitutes a sca...

Era una giornata fredda e buia. La povera Mary stava percorrendo la solita strada per arrivare a scuola, quando ricevette l’orrido telegramma.   Aveva paura di leggerlo, aspettò di giungere all’ istituto per poterlo leggere. D’altro canto erano solo delle inutili cartacce cosa potevano mai nascondere? Mary una volta in classe lesse il biglietto. Dopo averlo letto, andò in bagno sconvolta dalla notizia. Era scioccata le labbra le trepidavano, le gambe le tremavano.  La campanella suonò e la ragazza tornò subito in classe. Cercò nella felicità e nella comprensione di Miss Measows  rifugio ma non era il giorno adatto. Anche essa appariva agli occhi innocenti delle fanciulle molto triste. Mary porse all’addolorata docente un crisantemo giallo. Ma la maestra di musica andò in avanti senza accettare il regalo. La povera Mary scossa suonò per tutta la mattina fino a quando la precettrice non fu richiamata dalla preside. Miss  ...

It was a cold and dark day. Poor Mary was on her way to school, when she received the horrible telegram. He was afraid to read it, he waited to reach the institute to read it. On the other hand, were they just useless papers what could they ever hide? Mary read the ticket once in class. After reading it, he went into the bathroom shocked by the news. She was shocked her lips trembled, her legs trembled. The bell rang and the girl immediately returned to class. He sought in the happiness and understanding of Miss Measows refuge but it wasn't the right day. It also appeared to the innocent eyes of the very sad girls. Mary handed the sorrowful teacher a yellow chrysanthemum. But the music teacher went forward without accepting the gift. Poor little Mary played all morning until the nun was called back to the principal. Miss Meadows returned with another face, and made the students rejoice by making them sing cheerful and festive music. Ma...

From the absolute time of Galileo to the Einstein space-time The theory of relativity formulated by Albert Einstein, first in its restricted version and then in the general version, profoundly modified the Galilean theory of relativity and changed our concept of time and space. Although surprising, Einstein's forecasts have received numerous confirmations. Always to relativity we must the most famous equation of physics: E = mc2 The traveler's dilemma Imagine that you are the passenger of a stationary train at the station and observe from the window another train that is waiting to leave on the near track. Suddenly we realize that this second train is moving away. Instinctively, to be sure that it is the other train to move and not ours, we will look for a reference on whose immobility we have no doubt, for example the station platform or a sign. But if it were night and only the other train was visible and not the station? In that case it would not be easy to decide which ...

Si… credo che questo sia il regalo perfetto per te! Sono molto contento di avertelo regalato per il tuo compleanno sorellina. Cari lettori questa frase diede inizio al declino della famiglia del povero Francesco. Un giorno, non molto in anticipo rispetto al compleanno della piccola Berenice, il povero ragazzo festeggiava il suo di genetliaco.  In quel giorno di grande baldoria, egli si aspettava di tutto come regalo, tutto, tranne un oggetto fuori dal comune. Infatti, i suoi genitori, insieme alla maggior parte dei parenti, deciso di regalargli uno strano arnese elettronico!!!  L’eccentrico dono era tutto altro che comune anzi, era decisamente inaspettato. La famigliola coesa e felice, regalò al povero fanciullo un pupazzo a forma di aspirapolvere vivente! Francesco, ovviamente, reagì con tutta la serenità e la compostezza di cui era capace, distruggendo il tavolo su cui poggiavano i vari altri regali ricevuti nonché  la maggior parte del cibo ...

Yes ... I think this is the perfect gift for you! I am very happy to have given you for your little sister's birthday. Dear readers, this phrase began the decline of the family of poor Francis. One day, not much earlier than the birthday of little Berenice, the poor boy celebrated his birthday. On that day of great revelry, he expected everything as a gift, everything except an unusual object. In fact, his parents, together with most of his relatives, decided to give him a strange electronic tool !!! The eccentric gift was all but common, indeed it was decidedly unexpected. The cohesive and happy little family gave the poor boy a puppet in the shape of a living vacuum cleaner! Francesco, of course, reacted with all the serenity and composure he was capable of, destroying the table on which the various other gifts received were stored as well as most of the food available. After tormenting nights spent thinking, the young man decided to get rid of the ...