bigthink_tg

August 15, 2024, 11:00

Why does the carving of a 12th-century Spanish cathedral show an astronaut in a spacesuit?

On the carvings of the New Cathedral of Salamanca, built in the 16th-18th centuries, you can find the figure of an astronaut in a spacesuit.

No mysticism here: according to a local tradition, every time buildings are restored, elements reflecting modernity are added. One of the craftsmen chose the astronaut during the next restoration in 1992.

Vandals have since damaged the hand and face of the figure, making it look as if it has survived the centuries.

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bigthink_tg

August 14, 2024, 18:00

Why is it believed that hair grows faster and gets darker after the first shave?

The notion that hair grows faster and gets darker after the first shave is mistaken.

It's just that initially the hair has thin, blond tips. After they are shaved, the hair grows upwards with blunt, dark ends, which creates the illusion.

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bigthink_tg

August 14, 2024, 11:00

Why does Jomolungma have a second name, Everest?

Since the first one was not known to surveyors. In the 19th century, the British were surveying in the Himalayas. They could not get on the territory of Nepal which was closed to foreigners and they measured from India more than 200 kilometers away from the Nepalese peaks.

At that time the highest mountain was Kanchenjunga on the Nepalese-Indian border. In 1852 the Indian mathematician Radhanath Sikdar, on the basis of measurements taken by the British, calculated that the mountain, conventionally called Peak XV, was higher than Kanchenjunga.

It had to be given a name by which it would be recognized in the world. Not knowing the mountain's Tibetan name (Jomolungma), Andrew Waugh, head of the British India Survey, named the peak after his predecessor in that position, George Everest.

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bigthink_tg

August 13, 2024, 18:00

Why doesn't food burn on oil?

Oil prevents overheating. Food does not conduct heat well. When frying in a "bare" pan, the bottom layer of the food gets so hot that it can char, while the top of the piece stays raw. The oil transfers the heat from the lower layers to the upper ones.

The main thing is that it, like any liquid, cannot get warmer than its boiling point since the incoming new heat is carried away with the vapor. The boiling temperature of oil is sufficient to form a crispy crust on food.

Cooking and braising do not produce crusts: in these cases, water, which has a relatively low boiling point, plays the role of a stabilizer.

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bigthink_tg

August 13, 2024, 11:00

Why is it wrong to burn trash in volcanoes?
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Cause dumping trash into the lava lakes of volcanoes can trigger an eruption. Lava lakes are unstable, so if you puncture their surfaces with something cold, like trash, you trigger a chain reaction of explosions with compressed and acidic vapor.
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Also, all the moisture accumulated in the waste instantly evaporates, the steam expands, escapes outward, tears up the debris and creates bursts of molten rock.

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bigthink_tg

August 12, 2024, 18:29

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bigthink_tg

August 12, 2024, 11:20

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bigthink_tg

August 11, 2024, 11:00

Why does a camel spit?

Camel spitting is an element of threatening behavior in a conflict between individuals, mostly males. In this way, the male intends to force its rival to admit defeat without seriously injuring it and without getting hurt itself.

After domestication, camels began to use this form of behavior also in conflicts with humans, especially strangers whose actions seem dangerous or irritating to them.

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bigthink_tg

August 10, 2024, 18:00

Why are there indentations on the golf ball?

These "indentations" on the ball are needed to increase the range of the ball. So air flowing around an uneven ball reduces the vacuum trace created by speed.

Thus the boundary layer of air in a smooth ball doesn't have time to go behind its back side, so it creates a zone of reduced pressure, which means less velocity.

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