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Yes. Everybody dreams. Not only all humans, but in fact all mammals are shown to have REM sleep, which is associated with dreams. So if you think you don\'t dream you probably just don\'t remember.
Adult humans spend as much as a quarter of their sleep time in REM, integrating the constant influx of new information and shifting in to longerterm memory. By contrast, birds, whose behavior is so reflexive that they have little need to store memories long term, spend only
1-5% of their time in REM sleep. And reptiles, even more
primitive and genetically programmed creatures, have
no REM sleep.
Therefore is one mammal that does not experience
REM sleep. The echidna, or spiny anteater belongs
to a group of primative mammals called nontherieans,
which includes just one other species, the platypus.
The amount of nightly sleep that healthy individuals
require, varies widely from person to person and is
considered to a biological attribute, like weight. Although
there is no \"normal\" length of a good night\'s sleep for a
given age group, sleeping requirements genereally decrease with age. Adults sleep, on the average, between 7 to 8 hours each night, with individual averages ranging from 4 to 10 hours. Studies have shown that a person forced to sleep slightly less each night, because of a job, school, and so on, will still function normally. Even extended periods without sleep, such as one week, do not appear to harm the body seriously.
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