गोनोखोगिरिफोरा दिहुनो नाजादों, सुबुंफोरनो मानो उनदुनाय नांगौ आरो बेयो देहायाव माबोरै बोलो होफिननो।
Scientists are trying to find out why human beings need to sleep and how it restores vigour to the body.