Earth
The tectonic forces that are shredding New Zealand
This week's fatal earthquake in Christchurch is just the latest evidence of the deep-Earth processes that are pulling the country apart
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This week's fatal earthquake in Christchurch is just the latest evidence of the deep-Earth processes that are pulling the country apart
North America's monarch butterfly has bounced back after its worst year ever – but it is still the fourth worst year since records began in 1993