Life Twitter mood maps reveal emotional states of America The mood of the nation at midday and 11 pm EST brightcove.createExperiences(); Video: Twitter mood map America, are you happy? The emotional words contained in hundreds of millions of messages posted to the Twitter website may hold the answer. Computer scientist Alan Mislove at Northeastern University in Boston and colleagues have found that these "tweets" … 51¶¯Âþ
Earth Beyond decibels: Planning the new sounds of the city As the noisy internal combustion engine is phased out, how will this scene sound? City-dwellers may hate traffic noise and loud, late parties, but they enjoy a "vibrant calm" soundscape, says Trevor Cox , and we should cultivate it I WENT on a "sound walk" in London in spring last year. Thirty people gathered near … Opinion
Space Is a cosmic chameleon driving galaxies apart? Where do we look to observe this accelerated expansion? A shape-shifting fifth fundamental force could neatly explain the mystery of dark energy – and some other puzzling astronomical observations ASK A cosmologist for a potted history of the universe, and it might go something like this: the cosmos began some 13.6 billion years ago with … Features
Enigma Number 1606 Nightmare! You are in a locked room, seated at a table on which stands a two-pan balance. One of the pans holds a number of steel ball bearings, each weighing the same whole number of grams greater than 1. If you could determine the total weight of the balls, you could work out the number … Regulars
Sciency sporting excuses – the winner Here's what you could have won Sciency sporting excuses – the winner LAST month, as the world was in a fever of anticipation over the football World Cup, Feedback had a vision of what was about to come to pass. Soon, we foresaw, all but a few teams would be roundly humiliated and sent home … Regulars