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What evidence of the Phoenician sailors, who sailed around the southern tip of Africa in 600 BC, made contemporaries doubt their veracity? Detailed answer

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What evidence of the Phoenician sailors, who sailed around the southern tip of Africa in 600 BC, made contemporaries doubt their veracity?

According to Herodotus, the Phoenicians performed this wonderful voyage at the behest of the Egyptian pharaoh Necho II (610-594 BC). They started their journey from the Red Sea, rounded the southern tip of Africa (Cape of Good Hope), passed through the Pillars of Heracles (Strait of Gibraltar) and returned to Egypt after spending three years at sea.

In his "History" Herodotus writes: "They also told me, which I do not believe, but someone else, perhaps, will believe that while sailing around Libya (as the ancients called Africa), the Phoenicians had the sun on the right side." So, going around Africa from the south and moving from east to west, the Phoenician sailors "had the sun on the right side", that is, in the north.

It is this fact, which seemed implausible to the inhabitant of the Northern Hemisphere Herodotus, who considered the Earth flat, confirms to us that the Phoenicians really crossed the equator, passed through the waters of the Southern Hemisphere and circled Africa from the south, moving in a westerly direction.

Author: Kondrashov A.P.

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What kind of people can perceive ultraviolet radiation and in what form?

If a person is missing the lens of the eye as a result of surgery, trauma, or a congenital anomaly, they are able to perceive ultraviolet light as a whitish-blue or whitish-purple color. However, this is not the same as true tetrachromatism, which many birds, fish, and insects possess. With such vision, in addition to the three ordinary cones, there is a fourth in the eye, which perceives just the ultraviolet spectrum, due to which the number of distinguishable shades of colors is much higher.

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In big cities, weekends are colder than weekdays. 30.01.2017

Scientists led by Nick Earle from the University of Melbourne (Australia) have shown, using the example of Melbourne, that the air temperature in the city is on average always higher on weekdays than on weekends. The reason for this is the heat generated by human bodies, cars, public transport and the operation of office buildings.

The study is based on an analysis of over 50 years of temperature data collected by the Australian Bureau of Meteorology.

According to researchers, the average morning temperature on Thursdays and Fridays is 0.3°C higher than on Sundays. Moreover, these are average values, on calm days the difference can be much greater.

“The temperature jump causes heavy movement of 250 thousand people to Melbourne on weekdays compared to weekends. Nothing in nature happens on a weekly cycle, so this phenomenon is most likely associated with human activity,” Nick Earl explained.

Earle and his colleagues showed that three other major cities in Australia - Sydney, Brisbane and Adelaide - have similar weekly temperature cycles. Less populated cities like Hobart don't see anything like this, probably due to smaller populations.

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