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2020
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2018
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2017
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2016
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2015
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"Faith is, at one and the same time, absolutely necessary and altogether impossible."

Physics

WHO DISCOVERED GRAVITY?»
The fact that objects dropped from a height fall to the ground, that the Moon is near ...
WHICH KINDS OF OBJECT ARE ELECTROPLATED? »
Objects may be electroplated for protection or to enhance their appearance. Very often, the ...
WHAT IS ELECTROPLATING?»
Electroplating uses electrolysis to deposit a thin layer of metal on another substance. The ...
WHAT IS ELECTROREFINING? »
Electrorefining, as the word suggests, is a way of purifying metals by using electrolysis. ...
HOW DID HUMPHRY DAVY DISCOVER NEW ELEMENTS? »
Humphry Davy (1778-1829) was an English chemist who conducted some early experiments using ...

Chemistry

WHAT IS GEOTHERMAL ENERGY? »
The earth itself is a store of energy, as the rocks inside it are extremely hot. Water in ...
WHAT IS A JOULE? »
A joule (J) is a small unit of energy. More commonly, we measure energy in kilojoules ...
HOW CAN ENERGY BE STORED? »
Energy from the Sun is stored in the leaves of plants, but it is also possible to ...
HOW DO HUMAN BEINGS GET THEIR ENERGY? »
Our energy comes from the Sun — but not directly. Plants convert sunlight into chemical ...
HOW DOES A POWER STATION WORK? »
Coal, oil or gas may be used to fuel a power station. All of these are fossil fuels, formed ...

Biology

Is wildlife in danger?»
Many of us have a favourite wild animal, such as a tiger or bear. But did you know ...
How we can help the wildlife which is currently in danger?»
We must do more to protect nature. Experts say thousands of plants and animals may die out ...
Which unwanted visitors are endangering wildlife? »
When people bring new species into a habitat, they can threaten local plants and animals. ...
How can the animal homes be saved? »
All over the world, wildlife groups are working to save rare wildlife. This is called ...
Which actions of human are responsible for disappearing homes of natural habitant?»
As human numbers grow, more and more wild land is used to grow crops and raise animals. ...