AD ASTRA PER ASPERA

  Homo sapiens, the name that scientifically designates our species, is the result of a long evolutionary process that began in Africa during the Pliocene Epoch. Very few fossils have been found, and there are no clear clues about what caused the amazing development of the culture. some believe that a change in the brain or vocal apparatus permitted the emergence of a complex language. Other theories hypothesize that a change in the architecture of the human mind allowed Homo sapiens to use imagination. what is certain is that hunting and gathering was a way of life for 10,000 years until people formed settlements after the ice age and cities began to emerge.   PRIMATES DEVELOP         Perhaps motivated by climatic change, some five million years ago the species of primates that inhabited the African rain forest subdivided, making room for the appearance of the hominines, our first bipedal ancestors. from that time onwards, the scientific community has trie...

                                                                  The human body is arguably the most complex organism that exists on this planet. made up of more that 100000 billion cells, each with its own unique identity, the human anatomy is a fabulously synchronized and integrated living machine that can perform a remarkable range of activities and functions.            A human being consists of a single structure, but this one entity is made up of billions of smaller structures of four major kinds. these are cells, tissues, organ and systems.         Cells have long been recognized as a simplest unit of living matter that can maintain life and reproduce themselves. the term cell was first applied by Robert Hooke, a 17th century English scientist , who compared the inter...