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Stumped by a crossword puzzle?

Every computer, modem, server and smartphone that connects to the Internet has a unique Internet protocol (IP) address, which enables users to find it. The address format, known as IPv4, was standardized in 1977 as a 32-digit binary number, making a then seemingly unlimited 4.3 billion addresses (232) available. Now they’re almost gone

Sooner or later most of us suffer deep grief over the death of someone we love. The experience often causes people to question their sanity--as when they momentarily think they have caught sight of their loved one on a crowded street

The Oxford English Dictionary (hereon "OED", for simplicity’s sake) offers several alternative definitions for the term pride . Almost none of them are positive. For present purposes, let’s skip the more obscure leonine variant--and in fact, a "pride of lions " may actually have its etymological roots in the symbolic representation of this animal during the Middle Ages for the biblical sin--and instead turn our attention to the rather slippery semantic aspects, since there’s a lot encapsulated by this peculiarly bipolar word.

By Matt Kaplan of Nature magazine Archaeologists have long thought that Homo erectus, humanity's first ancestor to spread around the world, evolved in Africa before dispersing throughout Europe and Asia. [More]

The source of the deadly E. coli outbreak in Europe that has infected more than 2,100 and killed at least 22, is still a mystery.

By Priya Shetty of Nature magazine South African teenagers could pocket as much as 2,700 rand (US$400) over the next 18 months in exchange for staying HIV-free.

The planets of our solar system follow nice, predictable orbits, but it was not always so. In the chaotic early days of the solar system , Jupiter and its fellow giant planets seem to have migrated from their birthplaces into the stable orbits that we observe today

Money can’t buy you love.

Stars of the sky, like stars of the silver screen, hide their age well.

You're not going to like hearing this: the arsenal of mental and physical resources is out there right now could easily bring down our cybersecurity system, which protects the trivial, such as emails, to the critical, think banking system. The only reason it hasn't happened yet: the intent hasn't been there. [More]

It is estimated that the world's cities spew some 70 percent of global greenhouse gases, but often, they don't know where those gases are coming from. To address that knowledge gap, a sustainability group and a coalition of the world's largest cities are banding together to come up with a universal protocol for measuring and reporting heat-trapping gases. [More]

By David Schwartz PHOENIX, June 6 (Reuters) - A massive fire burning in [More]

By Gerard Wynn BONN, Germany (Reuters) - U.N.

* Gap in system for protecting people fleeing climate-UNHCR * New safeguards needed for global warming-Guterres [More]