I am feeling I have no friend no life no marks and I am in class 10 yesterday was my farewell thought it would go well but things don’t turn out the way I thought everyone hates me
GREATEST INVENTIONS THAT REVOLUTIONIZED THE WORLD
INVENTIONS THAT CHANGED THE WORLD: ~WHEEL: Before the invention of the wheel in 3500 B.C., humans were severely limited in how much stuff we could transport over land, and how far. The wheel itself wasn't the most difficult part of "inventing the wheel." When it came time to connect a non-moving platform to that rolling cylinder, things got tricky also the holes at the center of the wheels and the ends of the fixed axles had to be nearly perfectly round and smooth, he said. The size of the axle was also a critical factor, as was its snugness inside the hole (not too tight, but not too loose, either). ~PRINTING PRESS: German inventor Johannes Gutenberg invented the p rinting press sometime between 1440 and 1450. Key to its development was the hand mold, a new molding technique that enabled the rapid creation of large quantities of metal movable type. Though others before him — including inventors in C hina and Korea — had developed movable type made from meta...
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