A brief history of timekeeping When humans first started to measure time , the hours of the day were of different lengths. Then the mechanical clock fundamentally changed human life. The history of timekeeping culminates in the invention of the mechanical clock . It was not until the 14th century that people begun to measure time in smaller units. Until then, humans relied on nature to determine the time of the day. In the 6th century, a demand for more accurate time measurement arose in the medieval monasteries of Europe. The monks followed the ancient Greeks and Romans who originally divided the day into 12 hours, and divided each day and each night into twelve equal units - hours. To determine the time of the day, the monks used a variety of timekeeping devices. Historians are unable to determine when exactly the first mechanical clock was invented, but according to researchers the earliest mechanical clocks originated in Europe, at the beginning of the Late Middle A

Have you ever wondered how dolphins and other marine mammals obtain fresh water when they have been in salty environments all their lives?  These Wild animals Are Surrounded by Water. But What Do They Drink?  They don't have a desalination unit like in the gills of marine fish, and their kidneys can't dissolve sedimentary minerals. What kind of trick did nature invent? They can't drink seawater : w ith dolphins and whales, nature played an evil joke. It would seem that they are surrounded by water, but the use of salt water, on the contrary, will lead to dehydration and death. In the case of sea fish, part of the salt that comes with sea water into the body is desalinated in the gills, and the salty surpluses come out with urine. The salty environment in which they live, constantly pulls moisture out of the fish through the skin. It's a natural process - osmosis .   Therefore, these sea creatures have to drink sea water all the time and th

Some curious facts about intelligence and psychological skills behind it; common myths and misconceptions about intelligence dispelled.  Although researchers in the field have not yet given an official definition of intelligence, some identify intelligence as the ability of an agent to successfully face and solve new or unknown situations and problems. Intelligence is a great gift for human beings, and not all of us know how to use it as we should. Everyone is more or less intelligent, unless they suffer from some kind of disorder that involves a significant decrease in intelligence. Be that as it may, here we list several interesting facts about intelligence , besides explaining some theories and introducing people who, in one way or another, have been known to have great cognitive abilities . 20 interesting facts about human intelligence 1. Tests do not measure intelligence in absolute terms Contrary to what many people believe, intelligence questionnaires are no