7 Most Dangerous Jellyfish in the Underwater World

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Clinging jellyfish (Gonionemus vertens)

This unique jellyfish has a very characteristic appearance for its name. Under a transparent dome up to 80 mm in diameter. you can see a brown cross and 60 thin tentacles, each of which carries a «bag» with stinging cells. The venom of this jellyfish is fatal after a second burn. After the first person is threatened with numbness of the extremities, lower back pain, difficulty breathing, nausea and thirst for 3 to 4 days.

«I’m an Engineer»: 25 Ingenious Inventions of Ordinary People

Obviously, loyal fans of the Crazy Hands section from a popular TV show worked on inventions from today's selection. The genius of the authors of these ideas sometimes crosses the maximum mark, but let's be honest ... Who cares how and from what this or that device is made if it works 100%? We bring to your attention 25 ingenious inventions from the category of "I’m my mother’s engineer"!