| http://www.w3.org/ns/prov#value | - And six months of darkness can take a psychological toll, triggering depression and an increase in cases of seasonal affective disorder (SAD). ???Especially in winter, SAD is a real problem,??? said Parazynski. ???You???ve got 24 hours of night for months at a time, so little things that could be shrugged off in a normal environment become big as mountains.
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