The eggs, perhaps because of their shape and substance very particular, have always played a unique role, the symbol of life itself, but also the mystery, almost sacred. Already at the time of paganism in certain beliefs, Heaven and Earth were considered two halves of the same egg, and eggs were the symbol of the return of life. The birds in fact were preparing the nest used to contain the eggs: then everyone knew that the winter and the cold had passed. The Greeks, Chinese and Persians exchanged them as …

Salzburg, as you know, is the city of Mozart. But you never thought to the meaning of the name Salzburg? “Burgo” comes from the German Burg, namely fortress city, and “salis” from the Latin word that means the salt. Ie: the city of salt. In fact the whole region of Salzburg is rich in salt. Austria, a country, with no sea borders, paradoxically possessed in the past some of the richest (and profitable) deposits of sea salt. Even today, moreover, its mines are active, and also visited. But why there …

The visible white light coming from the Sun is composed from superposition of electromagnetic waves of different wavelengths ranging from the radiation that we perceive as violet, to the radiation that we recieve as red then blue, green, yellow, orange. The dust particles and droplets of water present in the atmosphere are much larger than the wavelength of visible light: in this case the light is reflected in all directions equally, regardless of its wavelength. The gas molecules are smaller and the light behaves differently depending on its wavelength. The …

A portion of the brain that plays an important role in triggering the yawn is the hypothalamus (where are also guarded the centers that synchronize sleep and wakefulness, hunger and thirst, body temperature). In particular, some neurotransmitters (including dopamine) and neuropeptide have an important role in stimulating this behavior. Yawn is a stereotyped behaviour and there are not differences of sex, race, age in the way you yawn: there is a long inhalation followed by a brief exhalation during which it is very difficult, almost impossible, to avoid opening your …

A real reason, both religious and ethical, does not exist, but we can say that faith is carried on the ring finger left hand only for a social “custom”. The exchange of faiths that is between spouses during the wedding ceremony has very ancient origins and comes directly from the Germanic territories, after consolidating in those of the Roman Empire. Only in the Late Middle Ages was officially introduced into the wedding ceremony, with the emergence of a particular liturgy. The custom of putting the ring (both engagement and marriage) …