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What is special about tears?Reflex tears clear debris, like smoke and dust, from your eyes. Continuous tears lubricate y...
22/02/2022

What is special about tears?
Reflex tears clear debris, like smoke and dust, from your eyes. Continuous tears lubricate your eyes and help protect them from infection. Emotional tears may have many health benefits. Whereas continuous tears contain 98 percent water, emotional tears contain stress hormones and other toxins.

Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD),...
21/02/2022

Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Smoking also increases risk for tuberculosis, certain eye diseases, and problems of the immune system, including rheumatoid arthritis.

Who invented the first wheel?The wheel was invented in the 4th century BC in Lower Mesopotamia(modern-​​day Iraq), where...
21/02/2022

Who invented the first wheel?

The wheel was invented in the 4th century BC in Lower Mesopotamia(modern-​​day Iraq), where the Sumerian people inserted rotating axles into solid discs of wood. It was only in 2000 BC that the discs began to be hollowed out to make a lighter wheel. This innovation led to major advances in two main areas.

What is the importance of subcultures?Subculture can be important in mental health care because subcultures sometimes de...
19/02/2022

What is the importance of subcultures?

Subculture can be important in mental health care because subcultures sometimes develop their own communication styles and social norms. Mental health professionals should be mindful of any subcultures a person belongs to when treating them, especially as they relate to a person's identity

Some mushrooms are called toadstools. This nickname probably came from the fact that they looked just like a perfect spo...
19/02/2022

Some mushrooms are called toadstools. This nickname probably came from the fact that they looked just like a perfect spot for a toad to sit! Some people believe that the term “toadstool" means a mushroom that is poisonous. This belief may have come from the fact that many toads were considered highly poisonous.

Bees – fun factsAll worker bees are female.A bee produces a teaspoon of honey (about 5 grams) in her lifetime.To produce...
17/02/2022

Bees – fun facts
All worker bees are female.
A bee produces a teaspoon of honey (about 5 grams) in her lifetime.
To produce a kilogram of honey, bees fly the equivalent of three times around the world in air miles.
The type of flower the bees take their nectar from determines the honey's flavour.

A drill is a type of electrical tool that has a spinning tip. It can be used for many different jobs depending on the at...
14/02/2022

A drill is a type of electrical tool that has a spinning tip. It can be used for many different jobs depending on the attachment. If a drill bit is attached, the drill can be used to make holes in material. A driver bit can also be attached, allowing the drill to put screws into the desired material.

Early wheels were simple wooden disks with a hole for the axle. Some of the earliest wheels were made from horizontal sl...
14/02/2022

Early wheels were simple wooden disks with a hole for the axle. Some of the earliest wheels were made from horizontal slices of tree trunks. Because of the uneven structure of wood, a wheel made from a horizontal slice of a tree trunk will tend to be inferior to one made from rounded pieces of longitudinal boards.

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