1) Fire:

Image Credit: Pixabay
The harnessing of fire is without a doubt one of the most important moments in the entire history of man. Current theories estimate that man learned to control fire sometime around 790,000 years ago. With the aid of fire, Man was able to spread across the globe, protect himself from wild beasts, cook food, and fabricate tools and weapons. Perhaps most important of all of the fire´s contributions is that it gave Man the confidence to conquer the world.
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