Sunday, April 7, 2013

When was time first recorded?



The ancient Sumerians and Egyptians were the first to divide the day into different parts. Around 3500 BC, slender tapering monuments were built to record time. Their moving shadows made it possible to divide a day into two parts by marking the time when the shadow is at its shortest, as midday or noon. These monuments were called obelisks, and they also showed the longest and shortest days, when the shadow at noon was the shortest, or longest in the year.
The passage of hours was first measured around 1500 BC when the first sundials were built. The sundial divided a sunlit day into ten parts, plus two parts for the twilight hours in the morning and evening.
Over the centuries, clock making became more developed and time keeping more refined, till today, there are devices that record time accurately to one hundredth of a second.

Wednesday, April 3, 2013

What is a Habeas Corpus?

Habeas Corpus is a fundamental element of all legal systems that have sources in English common law. It states that anyone being held in custody must be brought before the court, and the court must be convinced that there is sufficient reason to keep him in custody.


 

Tuesday, April 2, 2013

Why are weapons invented ?



Man’s first tools were stones which he had picked up. He choose stones that had been worn and sharpened by weather into shapes that could be used clubs for cutting and scarping.
The right shaped stones were not easily to find, so in time Man learned to fashion primitive tools to suit his purposes. These tools were first used just for hunting, and gradually, they developed into weapons that were deadly to people too.
Prehistoric Man’s tools could be made of bone , tooth, or more frequently stone, and in particular, flint. At first, these primitive weapons would be held directly in the hand. Eventually, however, Man learned how to attach these axe- heads to a wooden shaft, the power of the weapon was increased. As Man become more experienced in more stone tools, the tools became more and more advanced in their design.
Arrowheads were a great advance, because they meant that for the first time, Man could kill his prey or his enemy from a distance without putting himself at risk.
Early man used rocks for tools and weapons, and also to extract minerals. When the rocks on the surface were used up, he dug shallow pits to get the rocks he wanted these were the very first mines. Underground mines came later.

Why the wheel is considered one of Man’s greatest inventions?


The wheel was not invented by one man, or in one country. It was the result of the ideas of many men in many cultures over a long period of time. The first primitive wheels were found in the remains of Egyptians, Assyrians & Babylonians culture.
The wheel is probably the most mechanical invention of all time. The first primitive wheels were found in the remains of Assyrian, Babylonian, and Egyptian cultures. The wheel is probably the most important mechanical invention of all time. The key aspect of a wheel is that it made the invention of many other objects easy- and it also made it very easy to move larger objects. Nearly every machine built since the beginning of the industrial Revolution involves the use of the wheel, from tiny watch gears to computer disks.