A joy for science lovers, "Know It All" is your ticket to a grand meeting of curious minds "New Scientist" magazine s beloved Last Word column is a rare forum for un-Google-able queries: Readers write in, and readers respond "Know It All" collects 132 of the column s very best Q&As. The often-wacky questions cover physics, chemistry, zoology and beyond: "When will Mount Everest cease to be the tallest mountain on the planet?""If a thermometer was in space, what would it read?""Why do some oranges have seeds, and some not?""Many people suffer some kind of back pain. Is it because humans haven t yet perfected the art of walking upright?" And the unpredictable answers showcase the brainpower of "New Scientist s" readers, like the anatomist who chimes in about back pain ( Evolution is not in the business of perfecting anything. ) and the vet who responds, Quadrupeds can get backache too "