Elektr energitika bs 21 grux Talabasi

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Elektr energitika
BS 21 grux Talabasi
Musurmonov SHavkatbek 
 
 
 

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INVENTIONS THAT CHANGED 
YOUR WORLD
You may think you can’t live without your tablet computer and your 
cordless electric drill, but what about the inventions that came before 
them? Humans have been innovating since the dawn of time to get us to 
where we are today. Here are just 10 of the hundreds of inventions hat 
profoundly changed your world. What else would be on your list? 

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Stone tools were humanity’s earliest technology, invented more than 2 
million years ago by 
Homo habilis
, an early human ancestor. The 
simplest implements, known to their discoverers as "choppers," were 
sharpened stones made by smashing one stone against another. This 
clever (if crude) multi-tool could be used for cutting, sawing, crushing, 
or smashing. Without this innovation, humanity would have never 
known the spork. 

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The first successful photograph, the daguerreotype, was invented by 
Louis-Jacques-Mandé Daguerre and Nicéphore Niépce in the 1830s. 
Niépce’s first attempt needed 8 hours exposure time—Daguerre’s 
needed 20 or 30 minutes. Now, of course, we can take photos of anything 
we want, anytime, instantly.
While some musical instruments have been around for centuries (the 
oldest flute is thought to be at least 35,000 years old!) the saxophone is a