Banana health benefits

This is what 24 of the world's most iconic flags mean

F rom the skull and bones at the top of a pirate ship to a white flag on a battlefield, a single piece of fabric can be interpreted in a multitude of ways. Depending on where they fly, flags can represent freedom or control, danger or safety. In the context of modern times, flags are best known as national symbols — and they’re used to air a country’s past, present, and future vision all rolled into one. The Meaning of Flags Today’s infographic from Just the Flight looks at some the world’s most iconic flags, and the intricate stories and ideals that can be found in their designs. The Americas Since 1777, the star-spangled banner of the United States has gone through several facelifts. The current version has been in use since Hawaii gained statehood in 1960. Puerto Rico has been voting to become the 51st state in recent years — and if the U.S. government proved to accept such a resolution, the flag would be amended onc...

Scientists break record for highest-temperature superconductor

University of Chicago scientists are part of an international research team that has discovered superconductivity -- the ability to conduct electricity perfectly -- at the highest temperatures ever recorded. Using advanced technology at UChicago-affiliated Argonne National Laboratory, the team studied a class of materials in which they observed superconductivity at temperatures of about minus-23 degrees Celsius (minus-9 degrees Fahrenheit) -- a jump of about 50 degrees compared to the previous confirmed record. Though the superconductivity happened under extremely high pressure, the result still represents a big step toward creating superconductivity at room temperature -- the ultimate goal for scientists to be able to use this phenomenon for advanced technologies. The results were published May 23 in the journal Nature ; Vitali Prakapenka, a research professor at the University of Chicago, and Eran Greenberg, a postdoctoral scholar at the University of Chicago, are co-au...

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