Ever wondered . . . - what is earwax for?- when is the moon blue?- why are there only two sexes?- do doctors live longer?Informative, hilarious, sometimes unsettling and always unexpected, the questions and answers from New Scientist readers in the magazine's popular 'Last Word' column are endlessly fascinating.Will We Ever Speak Dolphin? brings the best of the bunch together in another witty, weird and wise compendium that's irresistible for 'Last Word' fans and new readers alike. If you've ever wanted to know why you can't hear shouting underwater, whether ants get scared of humans towering over them, how butterflies know where they're heading, or whether there really is a difference between martinis shaken or stirred, New Scientist has all the weird and witty answers.