Today I Learn
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Life is all about Learning. We learn something new everyday. What did you learn today ?

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Can fish breathe out of water?

Though some fish can breathe on land taking oxygen from air, most of the fish, when taken out of water, suffocate and die.

This is because gill arches of fish collapse, when taken out of water, leaving the blood vessels no longer exposed to oxygen in air.

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​​Why do airlines apply Speed Tape to their planes?
 
Airlines apply speed tape to their planes to temporarily repair minor damages to the aircraft's exterior.

Speed tape is a thin, aluminum tape with a pressure-sensitive adhesive. It is designed to withstand high temperatures and wind speeds, making it ideal for use on aircraft.

Speed tape is typically used to repair small dents, scratches, or cracks in the aircraft's skin. It can also be used to cover holes or gaps in the skin.

Speed tape is not a permanent repair, but it can keep the aircraft airworthy until a more permanent repair can be made.

The gaps between panels or fairings create drag if they aren't filled. The gaps also let water in, which can cause corrosion.
Normally, if they aren't removable panels that get opened all the time, they are sealed using a rubber compound called PRC to make a fillet seal.

The PRC takes a while to cure, so sometimes if a plane flies, the sealant will be covered with speed tape to stop it from getting damaged before it sets.

Or the seal will be temporarily made with just tape.

Or sometimes little fairings, bits of plane skin that are not structural, fall off or get damaged, and tape is used to replace them.

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Which bird produces milk?

The pigeon is one of only three bird species (the others being flamingos and male emperor penguins) known to produce 'milk' to feed their young. In pigeons the milk starts to be produced in the crop of the parent birds two days before eggs hatch.

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What does fire in the hole mean?

"Fire in the hole" is a warning that an explosive detonation in a confined space is imminent. It originated with miners, who needed to warn their fellows that a charge had been set.

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Can a shark swim backwards?

Unlike fish, sharks cannot stop suddenly or swim backwards.

A shark's pectoral fins cannot bend upwards like a fish, limiting its swimming ability to forward motion. If a shark needs to move backwards, it uses gravity to fall, not swim backwards.

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How long do dogs live on average?

Nearly 40% of small breed dogs live longer than 10 years, but only 13% of giant breed dogs live that long. The average 50-pound dog will live 10 to 12 years. But giant breeds such as great Danes or deerhounds are elderly at 6 to 8 years.

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How long is a kangaroo baby when it is born?

The young kangaroo, or joey, is born alive at a very immature stage when it is only about 2 cm long and weighs less than a gram. Immediately after birth it crawls up the mother's body and enters the pouch. The baby attaches its mouth to one of four teats, which then enlarges to hold the young animal in place.

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What percentage of the earth's water is drinkable?

Two percent of the water on earth is glacier ice at the North and South Poles. This ice is fresh water and could be melted; however, it is too far away from where people live to be usable. Less than 1% of all the water on earth is fresh water that we can actually use.

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Why do flamingos stand on one leg?

Flamingos often stand on one leg, the other leg tucked beneath the body. The reason for this behaviour is not fully understood. Recent research indicates that standing on one leg may allow the birds to conserve more body heat, given that they spend a significant amount of time wading in cold water.

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What was the first permanent Spanish settlement in what is now the United States?

Pedro Menendez de Aviles hastened across the Atlantic, his sights set on removing the French and creating a Spanish settlement. Menendez arrived in 1565 at a place he called San Augustin (St. Augustine) and established the first permanent European settlement in what is now the United States.

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​​How are lab grown Diamonds made?

Artificial diamonds, also known as laboratory-grown diamonds or synthetic diamonds, are diamonds that are created in a controlled laboratory environment rather than being formed naturally in the Earth's crust. These diamonds have the same chemical composition, crystal structure, and physical properties as natural diamonds, but they are produced through advanced technological processes.

The process of creating artificial diamonds involves replicating the conditions under which natural diamonds are formed, such as high pressure and temperature. Two main methods are commonly used: the High-Pressure High-Temperature (HPHT) method and the Chemical Vapor Deposition (CVD) method.

In the HPHT method, a small diamond seed is placed in a press that applies immense pressure and temperature, similar to the conditions found deep within the Earth. This process allows the carbon atoms in the seed to rearrange and form a larger diamond crystal.

The CVD method involves placing a diamond seed in a chamber filled with a carbon-rich gas, such as methane. The gas is then heated and broken down into carbon atoms, which are deposited onto the seed, gradually forming a larger diamond crystal.
It's important to note that artificial diamonds are not imitations or simulants; they are genuine diamonds with the same properties as natural diamonds, but they are created in a laboratory rather than being mined from the Earth.

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Is Mercury Found in Nature?

Like lead or cadmium, mercury is a constituent element of the earth, a heavy metal. In pure form, it is known alternatively as "elemental" or "metallic" mercury (also expressed as Hg(0) or Hg0). Mercury is rarely found in nature as the pure, liquid metal, but rather within compounds and inorganic salts.

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How cockroach can live without head ?

A cockroach can live for a week without its head. Due to their open circulatory system, and the fact that they breathe through little holes in each of their body segments, they are not dependent on the mouth or head to breathe. The roach only dies because without a mouth, it can't drink water and dies of thirst.

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What is the enzyme that breaks down lactose?

The enzyme responsible for breaking down lactose is lactase, an enzyme found on the wall of the intestines. Lactase breaks down lactose (the sugar found in milk) into galactose and glucose.

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Which ocean is the Bermuda Triangle in?

The Bermuda Triangle, also known as the Devil's Triangle, is a loosely defined region in the western part of the North Atlantic Ocean, where a number of aircraft and ships are said to have disappeared under mysterious circumstances.

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Is a volcano a type of mountain?

A volcano is a landform (usually a mountain) where molten rock erupts through the surface of the planet. In simple terms a volcano is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth. It is a hole in the Earth from which molten rock and gas erupt.

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