Which of the following planets has the highest revolutionary motion?
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First human who got married in space is
In 2015, underground glaciers of frozen water were discovered on
The maintenance functions of living organisms are performed by the _____.
What is the process of waste water treatment is commonly known?
The boundary between Earth's crust and mantle is _____.
___________ is the process of restoring a forest that once existed but was removed at some point of time in the past.
A level of atmosphere which is composed partly of electrons and positive ions is called