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Physics

When do we use a modem?»
Computers that are connected to a telephone line incorporate a device called a modem. ...
When was the CN Tower built?»
The CN Tower in Toronto, Canada is a communications and observation tower. This ...
When was the telescope invented?»
Galileo is credited with having developed telescopes for astronomical observation in ...
When was Braille invented?»
The Braille system was invented in 1829 by a blind gentleman called Louis Braille. He ...
When was the first microscope used?»
In the 16th century scientists were starting to look inwards at the secrets of the ...

Chemistry

How do we describe the elements livermorium, tennessine and oganesson? »
                        ...
What qualities make nihonium, flerovium and moscovium special? »
                    Nihonium is ...
What are the element numbers 110, 111 and 112? »
                      ...
What are the features of bohrium, hassium and meitnerium? »
                      ...
What are the characteristics of the elements 104, 105 and 106? »
                      ...

Biology

When does our sense of touch alert the brain of danger?»
Close your eyes and touch something, such as your clothes, a table, a car or even your ...
When do we lose our sense of taste?»
Compared to other sensations (in particular smell) our taste sense is not very ...
When do we recognize a specific taste?»
Tastes are detected by thousands of taste buds scattered along the tip, sides, and back ...
When do people wear contact lenses?»
If the eye is not exactly the right shape, or the lens cannot focus properly, you ...
When do we see images upside down?»
The eyes are the body’s windows on the world. Like a video camera they detect a moving ...