It depends. each timeline is different. Some have 10 and some may have 50 :)
Answer: The Printing Press
Explanation: Gutenberg made way for books to be copied mechanically, and not by hand, allowing books to become widespread for the first time.
The hard snow walls of an igloo are good insulators that keep in body heat and also the heat generated by oil lamps, these are known as qulliq. This is why traditional igloos are commonly made out of snow rather than ice and this is because solid ice does not retain heat as well as blocks of compressed snow. In addition, the walls block the wind, which is often so bitter that it can make freezing temperatures feel many degrees colder. Also, insulation capabilities actually increase a few days after construction. Body heat and sun exposure cause the inside of the igloo to melt ever so slightly. When the igloo is unoccupied during hunting expeditions, the melted snow freezes over, turning into ice. Gradual thawing and refreezing turns the entire structure to solid ice, making it not only superstrong, but warmer than ever.
Explanation:
Via the confirmation process, voters will oust politicians from office.
Wasn't at the national level, nor at the state level. The government departments. Power is split between the political, administrative and legislative assemblies.
