Why do the eyes of some animals shine in the dark?

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Physics

What is a CAT scanner? »
               CAT scanner is the most modern ...
Why are there three pins in a plug? »
               You know that each electrical plug ...
How heavy loads are lifted by pulleys? »
               Pulley is one of the earliest ...
What is a Black Box? »
               Whenever any airplane gets crashed, ...
How can we use the internal heat of Earth? »
               We know that our Earth is ...

Chemistry

What are Antifreeze Compounds? »
               Antifreeze compounds are those ...
What are fuel gases? »
               The use of gas for cooking and ...
What is Carbon Cycle? »
               Of all the elements known to man, ...
What is Ceramics? »
               The word ‘ceramics’ has its origin ...
What is the absolute zero? »
               It is our common practice to measure ...

Biology

How does wool keep us warm? »
               There are about 950 million sheep in the ...
Why is it difficult to see things immediately when we enter a dark room? »
               It is a matter of common experience ...
Why does milk spill out when boiled? »
                 When milk is heated it ...
What is First Aid? »
               Accidents are part of our lives. ...
Why are some deserts getting bigger? »
                About one third of the world’s ...