Such a highly destructive mud-flow (termed a lahar) eventually stops as a pile of debris of all shapes and sizes, as mixed up as a glacial moraine; the two deposits have often been confused.

Its perpetual flow of real-time, ultradetailed metrics allows the company to measure nearly everything its customers do: what they put in their shopping carts, but do not buy; when readers reach the “abandon point” in a Kindle book; and what they will stream based on previous purchases.

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A court yesterday rejected a challenge to the constitutionality of prohibiting same-sex marriage, snuffing hopes for marriage equality proponents to shortcut stalled legislative efforts.