" bullfrog " , studies have shown that bull frogs are showing full responsiveness when they are awake or even resting.






For humans sleeping is very essential , which is one of the important factor in their life. It is calculated that an average person will sleep for approx 24-years throughout entire life time.
An adult requires about 7-8 hours sleep and for an adolescence is 10 hours. All these are just scientific calculations , now lets talk about science of sleeping.




There are several types of sleeping , (sleeping at night, sleeping in classrooms, sleeping after eating food) the perfect sleep occurs when sleep inducing chemicals are raised in our body. The sleep inducing chemicals are Adenosine and Melatonin , which will make our sleep more deeper also decreases breathing and heart beats. The secretion of these chemicals will occur according to our surrounding conditions (darkness, sounds of cricket , etc).




Sleeping causes repairing of our DNA . During our waking hours our body cells will utilize energy , during this process there are several byproducts will be accumulated in our body. In our brain , the Adenosine will be clustered during end of day. The Adenosine increases the urge to sleep.
[The caffeine is well known for blocking the Adenosine receptors pathways , that's why people takes more coffee and tea are less likely to sleep ] It is just a case of Adenosine , but there are several other products will be present in our brain and if they are not cleared properly it will affects brain's working. Scientists have found that the Glymphatic system is a cleaning mechanism of our brain. It is active when we are sleep. It uses the CSF (Cerebrospinal fluid)  to cleanup the toxic chemicals and other factors which occur in our brain. The Lymphatic vessel present in our brain ( it is also a pathways for immune cells) will also play a vital role in cleaning out such toxic products in our brain.





Now you're thinking that "we will die, if we didn't sleep !!"

Yes , you will die.
In 1964, a high school student Randy Gardner hold the highest record for staying awake without sleep.




 He stayed awake for 264.4 hours (11 days and 24minutes), well that is the highest score for a human being , at first glance I thought 11 days is very easy for a human being to stay awake without sleep. Last year, I spend some days without sleeping oh man !! It's very tough , to stay awake without sleeping. The following are experiences of people who tried to stay awake without sleep;