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What is the difference between practice and practise?

Do not confuse "practice" with "practise". They sound the same and even look similar (except that one is spelled with a ā€œcā€ and the other with a ā€œsā€) but their meanings are different. The word "practice" is a...
why is space black

Why is space black?

Where there is no light then there is darkness. This means that a surrounding without light would be black in color. Our experience here on Earth (one common example, night and day) tells us that the color blac...