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Sailing stones, also called sliding or moving rocks is a geological phenomenon where rocks tend to move and leave long tracks into a valley surfaces like deserts without human or animal intervention.
Insects are among the most diverse groups of animals on the planet, including more than a million described species and representing more than half of all known living organisms.
Alfred B. Nobel was a Swedish chemist, engineer, innovator, and armaments manufacturer. Go through this short quiz and build up your Dreevoo knowledge score.
