How many needles does a hedgehog have? Detailed answer

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How many needles does a hedgehog have? Detailed answer

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How many needles does a hedgehog have?

About 9000. The length of the needles is about 2-3 cm, and each is equipped with a muscle that allows them to be ruffled in case of danger.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

How did Zeus punish people for Prometheus stealing fire?

To punish people for the theft of fire by Prometheus, Hermes, at the behest of Zeus, fashioned a woman from clay - Pandora, making her stupid, evil, lazy, cunning and deceitful. Athena breathed life into Pandora, after which Aphrodite endowed her with irresistible charm.

Accompanied by Hermes, the Thunderer sent Pandora to the titan Epimetheus, who was immediately captivated by her beauty and took her as his wife. In the house of Epimytheus, a vessel left to him by Prometheus, his brother, was kept, in which Prometheus had previously with great difficulty concluded all the hardships that annoy mankind: old age, birth pangs, illness, madness, vice and passion.

One day, Pandora, unable to resist the natural female curiosity (Zeus counted on this), opened the vessel. Instantly, thousands of troubles flew out of it and began to sting Pandora and Epimetheus, and then attacked mortals. An impossible dream, which Prometheus also hid in a vessel, prevented people from committing suicide.

There are those who claim that the vessel that belonged to Prometheus contained all the good gifts with which he intended to make mankind happy. When Pandora opened the lid, they scattered, never to return again, and only a lingering hope remained at the bottom.

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Vulnerability of Empires 18.12.2023

Scientists from the universities of Wageningen (Netherlands), Cambridge, Exeter (UK) and Washington State (USA) conducted a study on the question of the existence of patterns in the dynamics of the destruction of empires or societies. The study's findings, published in the journal PNAS, point to the importance of domestic factors in the context of states' vulnerability to collapse.

Domestic political processes play a key role in states' vulnerability to collapse. Understanding these patterns can help develop more effective strategies for managing and preventing potential crises in modern societies.

Professor Tim Kohler from the University of Washington, one of the authors of the study, emphasized that despite the influence of external factors such as natural disasters, their role is usually a trigger that activates the internal dynamics of the state.

Scientists analyzed the history of 324 ancient states, spanning five millennia. This approach, usually used to study the risk of death in aging people, was used for the first time to study the probability of the collapse of societies. The results showed that the risk of state collapse increases sharply in the first two centuries after their formation, after which it stabilizes. This allows some societies to last much longer than others.

This pattern has been identified both in the history of European societies of the modern era, and in the early civilizations of North and South America, as well as in the Chinese dynasties. For example, the ancient dynasties of China had a life expectancy limit of about 300 years over two millennia.

Researchers believe that despite significant differences between modern and ancient societies, the former may be subject to the same mechanisms that have influenced states for millennia. The social injustice, scarcity and extreme climate challenges that destabilized ancient societies can still cause discontent and violence in modern times.

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