Japan's response to a tsunami threat following major earthquake shows it has learned much from past events, including the deadly quake and tsunami that disabled the Fukushima nuclear power plant.
Villages across Nepal remain strewn with rubble, the quake victims still living in tents and flimsy sheds.
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When two major earthquakes occur within days of each other thousands of kilometres apart, it can look like they're connected. But are they? Here's what the science says.