Switching electricity
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The cannonball is like a float in mercury.

It does not sink only due to the fact that the density of iron is less than that of mercury.
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Countries with the highest divorce rate in the world
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SF
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"One morning at the gates of the Louvre", 19th-century painting by Édouard Debat-Ponsan. (Catherine de' Medici portrayed is in black) This painting depicts the aftermath of the St. Bartholomew's Day Massacre in 1572. This wave of catholic mob violence against the Huguenots was said to have been instigated by the King's mother, Catherine de' Medici. On August 23, the king ordered the killing of a group of Huguenot leaders, and the slaughter spread throughout Paris, as people began to hunt Protestants throughout the city, including women and children. Lasting several weeks, the massacre expanded outward to other urban centres and the countryside, claiming thousands of victims.
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Medieval artwork by Jean Fouquet, “The Right Hand of God Protecting the Faithful against the Demons,” ca. 1452–1460. Notre Dame cathedral, which was 115 yrs old at the time, can be seen in the background
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Scientists in the USA have created a microscopic camera the size of a grain of salt. It can take pictures at the same level as lenses five hundred thousand times larger. Such a gadget will be useful for doctors — it allows you to see problems in the human body, and it can also be used in the manufacture of robots and equip the most miniature machines with "vision".
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Percentage of teens ages 15-17 who work part-time/full-time

1. 🇳🇱 Netherlands - 62%
2. 🇧🇪 Belgium - 58%.
3. 🇸🇪 Sweden - 55%.
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Hongkong
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3D model of the heart
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A missionary points to the severed hand of a Congolese villager, c. 1890s, The Congolese man is likely to have been a victim of the "Congo atrocities", punishment, murders and mutilations that took place on colonial rubber plantations in the Congo Free State, territory owned by Belgian King Leopold II, who exploited it for its plant and mineral resources. Missionaries and others worked to focused public attention on the violence of Leopold's rule, eventually causing Leopold to relinquish control of the Congo after international backlash.
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