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The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion...
Within the lethal embrace of deserts, life can only flourish because of large springs. Here...
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
Standing bodies of water can form in depressions on the surface by both endogenic and exogenic...
Above a certain altitude snow does not melt, not even in summer.
Sea and land breeze form because of the differing warming of land and sea.
Tsunami waves are very high waves of immense destructive power.
A geyser is a spring characterised by intermittent discharge of water and steam.