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The main sources of ignition before humans appeared were lightning strikes. Our evidence of fire in the fossil record (in deep time, as we often refer to the long geological stretch of time before humans) is based mainly on the occurrence of charcoal.
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It is the machine that transforms energy, applying it to move water. This movement is normally upward. The pumps can be of two types "volumetric" and "turbo-pumps"
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Etymologically the word paper comes from Papyrus, a medium used by the Egyptians to carry out their writing.
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The bow and arrow is a ranged weapon system consisting of an elastic launching device (bow) and long-shafted projectiles (arrows).
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In its primitive form, a wheel is a circular block of a hard and durable material at whose center has been bored a hole through which is placed an axle bearing about which the wheel rotates when torque is applied to the wheel about its axis.
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The Bronze Age is a prehistoric time for humans; specifically, the time when humans began to use a metal called bronze (obtained by mixing tin and copper).
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Iron and steel metallurgy is the technique of treating iron ore to obtain different types of iron or its alloys such as steel
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The abacus is an instrument used to carry out simple arithmetic operations
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Thanks to the telescope - since Galileo Galilei used it in 1610 to observe the Moon, the planet Jupiter and the stars - human beings were finally able to begin to know the true nature of the celestial bodies that surround us and our location in the world. universe.
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He is said to have built a 9x instrument, which is sometimes claimed to have been made with the help of his father
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Cement is a binder formed from a mixture of calcined and subsequently ground limestone and clay, which has the property of hardening after being in contact with water.
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An electrical generator is any device capable of maintaining a difference in electrical potential between two of its points (called poles, terminals or terminals), transforming mechanical energy into electrical energy.
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The invention of the means of communication commonly known as radio, although it was generally attributed to Guillermo Marconi in the 1890s, spanned several decades since its theoretical foundations were established in 1873, until the existence of the radioelectric phenomenon was proven and finally developed the techniques necessary for its use in the wireless transmission of signals.
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A mobile phone or cell phone is a portable phone that can make or receive calls through a radio frequency carrier, while the user is moving within a telephone service area
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DVD is a type of optical disc for data storage.
