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The reason for manhole covers is usually round
The manhole cover in a round shape allows easy installation, transportation as well as preventing risk of leakage.
Edge
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146 published items.
New technology
American supersonic aircraft carrying people to space successfully
Virgin Galactic's supersonic jet launches on the edge of the universe during an important test flight yesterday, helping the company move closer to the goal of bringing…
Discover science
NASA announced the image of the ice floated square, never seen before
Nature creates all things with different shapes. But most things are not perfect, most of them are asymmetrical and ... ramshackle.
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Why is it when the coffee is dry, the stain is colored in light, in addition to bold?
Pouring coffee, wine, ... on cloth, paperwork is definitely not fun. If the stain sticks to the clothing, it can be faded by washing, but it may be dead to the paper.
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Student He found the best way to make chips
Few people know that accurate calculation of cutting lines helps potatoes achieve maximum and maximum crispness.
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Anything has a margin, but their history will make you laugh.
When you were in school, you must have been used to borrowing a ruler and then slapping one thing
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X-rays allow you to see small nanometer-sized edges buried deep in the CPU
Advanced technology is applied to detect errors before putting a new CPU on the market.
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Life on the island lies on the edge of the world
Foula Island resident of England had to cross the ocean to go buy food and accept life without cell phone waves.
Discover science
Interesting story behind the glass cup grinding the legendary edge
The granyonyi stakan is the granyonyi stakan glass cup, which is also known in Russia as a cup made of special thick and hard glass and has many sides. This was an extre…
1001 mystery
Mysterious human coffin on the cliff edge in Peru
In Karajia, near the city of Chachapoyas, there are impressive graves.
1001 mystery
The phenomenon of 'shadow spraying' on the Mekong River
On October 4, 2009, when people and visitors were standing in line on the edge of the river, suddenly from the river surface dozens of bright pink balls flew up, like a…
1001 mystery
The ghost appears mysteriously on the edge of the fence
A New Zealand real estate trader was appalled when he saw the image of a ghost appearing in the picture taken by herself.
Oceanography
The sea lion bites the skirt of the dress and slips the girl into the water
A sea lion suddenly bites the skirt of a girl sitting at the edge of Canada harbor and drags her into the water, causing everyone to witness panic.
Oceanography
The fish fight to fight to win
Edges have a scientific name, Neoclinus blanchardi, which is one of the most aggressive fish species and especially they have very wide mouths.
Oceanography
The smallest dolphin on the edge of extinction
Scientists have once again voiced the fact that Maui dolphins, the smallest and rarest among dolphins, are facing extinction. Their only habitat is on New Zealand's west…