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On Reddit: Earth Years Were Shorter

If the length of the Earth's year was shorter in the past, why do we use the current Earth year length as a guide to describe the age of things in space, e.g. the Universe?, and Negative emotions, chronic stress, depressive symptoms, hostility are associated with increased risk of stroke in middle-aged and older adults, University of Minnesota study shows http://goo.gl/JXEZkw #PopNews

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