Elektr energitika bs 21 grux Talabasi

fire likely predates the emergence of 
Homo sapiens
.There is evidence of 
cooked food from around 1.9 million years ago — before the evolution 
of 
Homo sapiens
. There is also evidence for the controlled use of fire by 
our ancestors, 
Homo erectus
, beginning around 1,000,000 years 
ago. Flint blades that have been burned in fires have been dated to 
roughly 300,000 years ago. There is also evidence that fire was used 
systematically by early modern humans to heat treat stone, to increase 
its ability to flake, for use in toolmaking around 164,000 years 

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ago.According to a heavily debated hypothesis, it was the use of fire for 
cooking that allowed the larger brain of Homo sapiens to develop in the 
first place, by allowing hominids to eat a wider variety of foods. 
From the past to the present, fire has been used in rituals, agriculture, 
cooking, generating heat and light, signaling, industrial processes, and 
as a means of destruction. It can easily be considered to be one of the 
leading inventions that changed the world.

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The sophisticated human life would not have been possible without the 
invention of the humble nail. They provide one of the best clues in 
determining the age of historic buildings.
Prior to the invention of nails, wood structures were built using rope, 
they were used to interlock adjacent boards. The invention of nails goes 
back to several thousand years and was possible only after the 
development of techniques to caste and shape metal. 

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Bronze nails dating from around 3400 BC, have been found in Egypt. 
According to the University of Vermont, the use of hand-wrought nails 
was the norm until the 1790s and early 1800s. By 1913, 90 percent of 
nails produced in the U.S. were steel wire nails. 
Source: Free-Photos/Pixabay
 
As with fire, the use of tools likely predated the evolution of 
Homo 
sapiens
, and may stretch back 2.6 million years or more. Today, there 
are a number of animal species that use tools.