Wonder+Why?

Why Do We Dream?

Dreams are often a response to our daily thoughts, activities and sensations. They are often, then, a reflection of what has consumed our minds in the preceding day or two. It generally takes the sleeper about 90 minutes to pass through all of the stages of sleep. Once the REM stage is completed, the process starts again. During the first cycle, REM lasts for only about five minutes. This, however, gradually increases until during the final cycle, a person in the REM stage for up to fifty minutes. So, in a normal night's sleep a person will spend between ninety and one hundred and twenty minutes in the REM dream state. That's the Five Stages of Sleeping.Then we wake up and sometimes forget about your dream the next day.



10:The most common element in the human bodyis oxygen 9: The catfish father keeps the eggs in his mouth until they are ready to be hatched 8: Armadillos spend about 80% of their lives asleep. 7: Only female mosquitoes bite people 6: Elephants are the only land animal that can't jump 5: Porcupines float in water. 4: The ant can lift things 10 times its own weight. 3:A single bacteria cell, given all the food it needs, could divide into a ball of cells the size of the Earth in 24 hours. 2: The electric eel of South America (Electrophorus electricus) can generate over 600 volts, and can paralyze even a horse. 1: When the queen of a clownfish school dies, a male clownfish changes its gender to become female and takes her place.