06:30
Invention of safety Bicycle
05:58
invention of STEEL
04:36
Tunnels
03:12
Discovery Of Soap
02:35
INVENTION OF VACCINATION
05:04
INVENTION OF HELICOPTER
05:04
INVENTION OF HELICOPTER 🚁
05:01
INVENTION OF TYPEWRITER
04:00
INVENTION OF PLASTIC BOTTLES
04:14
INVENTION OF MICROSCOPE
04:16
INVENTION OF WHEEL
04:25
INVENTION OF PAPER
04:01
INVENTION OF LIGHT BULB
02:18
INVENTION OF LIQUID SOAP
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