LifeSongs that birds 'sing' in their dreams translated into sound By measuring how birds’ vocal muscles move while they are asleep and using a physical model for how those muscles produce sound, researchers have pulled songs from the minds of sleeping birds 51¶¯Âþ
LifeDo animals dream and if so, what about? By studying the dream-like states of octopuses, pigeons and spiders, biologists hope to find out why dreaming evolved in the first place Features