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The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada.
The project had both positive and negative effects. The significance of the Manhattan Project was that it put an end to WWII by using weapons of mass destruction and forced Japan to surrender. The project was a desperate effort by the US to beat the N***s to the development of a nuclear weapon.
Nuclear facilities were built at Oak Ridge, Tennessee and Hanford, Washington. The main assembly plant was built at Los Alamos, New Mexico.

A natural pearl begins its life inside an oyster's shell when an intruder, such as a grain of sand or bit of floating food, slips in between one of the two shells of the oyster, a type of mollusk, and the protective layer that covers the mollusk's organs, called the mantle.
In order to protect itself from irritation, the oyster will quickly begin covering the uninvited visitor with layers of nacre — the mineral substance that fashions the mollusk's shells. Layer upon layer of nacre, also known as mother-of-pearl, coat the grain of sand until the iridescent gem is formed.
Cultured pearls are made in the same way. The only difference is that instead of accidental circumstances, a "pearl farmer" embeds a grain of sand into the mollusk.

Gorilla Glass is a special kind of glass created by Corning Inc that is used in electronic devices such as smartphones, tablets, and television screens.
The type of glass Corning creates for their Gorilla Glass is aluminosilicate. This sort of glass is sand-based and is made up of aluminum, silicon, and oxygen.
After the initial glass is created, the product is placed in a molten salt bath that's over 400 degrees Celsius. This heat triggers an ion-exchange process that forces the smaller sodium ions out of the glass and replaces them with larger potassium ions drawn in from the salt. This process of packing larger ions into the same sized space makes the glass significantly denser than it was originally.
This is what gives Gorilla Glass its strength and flexibility.
The first generation of Gorilla Glass was created in 2008 with additional iterations produced in 2012, 2013, and 2014. The fifth generation of Gorilla Glass was released in July, 2016 for general use in electronics while a new type of glass designed for smartwatches, Gorilla Glass SR+, debuted one month later.

Those small red lights around the CCTV cameras are called IR LED or simply infrared LED. They're used to supply lighting for security cameras to see in dark and low light conditions which are turned off at day time. Through those small red lights, cameras can be able to capture images at dark by means of infrared.

Sound cannot travel through the vacuum of space, but visible light and other forms of electromagnetic radiation can. One of these forms is commonly called radio. The astronauts have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit it to the ground (or other astronauts in space). This is exactly the same as how your radio at home works. Radio waves are often thought of as a form of sound because of their use in this way, but radio waves are NOT sound waves - they are a form of electromagnetic radiation analogous to visible light, and therefore can propagate through a vacuum.

Fan blades are curved for optimum air circulation which is determined by solidity ratio. Solidity ratio is the ratio of area of the blades to the area of the disc swept by them. well if the blades are flat, it will provide air circulation no doubt but the volumetric flow rate will be less compared to blade which is suitably curved based on aerodynamic principles.
In layman words, if the blades of the fan are not curved then they will not be able to produce a good amount of air as compared to the curved blades fan.

We can’t smell space directly, because our noses don’t work in a vacuum. But astronauts aboard the ISS have reported that they notice a metallic aroma – like the smell of welding fumes – on the surface of their spacesuits once the airlock has re-pressurised. The Rosetta spacecraft also detected compounds responsible for the smell of rotten eggs, bitter almonds and cat urine, boiling off from the surface of comet 67P/Churyumov-Gerasimenko.

The skin is made up of three layers:

the outermost layer everyone can see, called the epidermis.
the middle layer, called the dermis.
the innermost layer, called the subcutaneous layer.

When we're young, we don't have wrinkles because the skin does a great job of stretching and holding in moisture. The dermis has an elastic quality thanks to fibers called elastin that keep the skin looking and feeling young. A protein in the dermis called collagen also plays a part in preventing wrinkles.
But over time, the dermis loses both collagen and elastin, so skin gets thinner and has trouble getting enough moisture to the epidermis. The fat in the subcutaneous layer that gives skin a plump appearance also begins to disappear, the epidermis starts to sag, and wrinkles form.

, also known as , , and , is an unleavened flatbread from the Indian Subcontinent; and popular staple in India, Nepal, Bangladesh, Pakistan, Sri Lanka, East Africa and the Caribbean.

When looking at , you're actually looking into the . Many of the stars we see at have already .

How? When?
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