Scientists from the University of Barcelona in Spain found that the majority of inhabited planets must be covered with oceans by 90 percent. Such conditions create difficulties for the development of complex organisms, therefore, Earth-like habitable planets are exceptionally rare in the Universe. It is reported by Gizmodo.
According to the researchers, the ratio of the areas of land and oceans is influenced by such factors as the total amount of water on the planet available to the content space and the presence of troughs and ridges. If the oceans were small and elevation is small, the water can cover almost the entire surface of a celestial body.
Planetary scientists have developed a computer model that showed that almost all the planets where water is present, should be almost completely covered with oceans. On those rare occasions when drying occupies a large part of the surface, formed an extensive wilderness, which also prevent the emergence of complex life forms.
Earth is the exception to the rule. Its topography allows continents and Islands occupy about 29 percent of the entire area of the planet over millions of years that led to the emergence of large terrestrial animals.
A group of mathematicians explained the emergence of the grandmothers. According to the theory called "grandmother hypothesis" that menopause is explained by the need to help the younger generation to raise children that increases the chances of further transmission of their genes. However, this theory does not explain when it came grandmother.
At auction in new York sold the official report of the Soviet cosmonaut Yuri Gagarin's first flight into space, made in the English language. The lot was sold for 47.5 thousand dollars, it consists of three parts: the title page of the report signed by the astronaut and pictures of him in the suit.
American and German scientists showed that people who do not smoke and are not obese, and moderately drink alcohol, live on average seven years longer than others. A study published in the journal Health Affairs, and briefly about it reports the max Planck Society (Germany).
Deputy Chairman of Russian government Dmitry Rogozin is ready to arrive in Moldova by helicopter or motorbike. "The Prime Minister of Moldova considers that "Rogozin is expected to fly on military aircraft". Well. Then on the Moldovan authorities: a helicopter or motorbike?" — the politician wrote.
Armed Palestinians broke into a house in the Jewish settlement of Halamish in the West Bank of the Jordan river and attacked were people in the room, killing two men and one woman. Another woman with serious injuries was taken to hospital. It is reported by The Times of Israel.
Russian high jumper height Maria Laecken won the stage of the Diamond League in Monaco. 24-year-old Russian excelled with a score of 2 meters. Second place went to Ukrainian Yulia Levchenko, she obeyed, the height of 1.97 meters. Third place went to American Vashti Cunningham (1,97 m), it took her more attempts.