7 Most Dangerous Jellyfish in the Underwater World

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Portuguese boat (Physalia physalis)

The second name for jellyfish is physalia. Although this is rather not even a jellyfish, but a whole colony of polypoid and medusoid individuals. The «bite» of a Portuguese boat is extremely dangerous and painful (sensations are compared to hitting the skin with a whip). The main risk is the systemic effects of the poison. In severe cases, intense pain is followed by fever, shock, and impaired heart and lung function, which can lead to death. Physalias are accustomed to moving in groups of up to 100 colonies, and sometimes in resorts they have to close entire beaches because of them!

SOCIETY The 7 Worst Epidemics in Human History

The 7 Worst Epidemics in Human History

The new year 2020 began with the advent of a new virus in the Chinese city of Wuhan. To date, coronavirus has claimed about 100 lives and continues to test people for strength. The history of mankind has repeatedly known extremely dangerous viruses and epidemics, which claimed millions of lives, wreaking havoc on the trail of panic and chaos. But even the worst of all infections, people managed to win and live on ... exactly until the next outbreak of some mutated flu.
INTERESTING Titanic Then And Now: 30 Photos

Titanic Then And Now: 30 Photos

The tragedy of 1912, when the Titanic sank, left an indelible mark on the hearts of millions of people. Today, the archive contains photographs from the bottom of the ocean in which the liner sank. This selection will clearly show the very unique shots of the sunken ship in comparison with the pictures that were taken in the year of the tragedy.
ANIMALS 10 Erroneous Facts About Animals

10 Erroneous Facts About Animals

Some knowledge about animals was passed on to us by word of mouth, some we learned at the school desk, and some we learned from the media. But is all our knowledge true? We picked up 10 erroneous facts about animals that you might not have guessed about ..