Nipples don’t have muscle inside them — the erection of the nipple happens because of tiny smooth muscle fibers in the areola that contract in response to cold, touch, or sexual arousal.
Research studies have found knitting to be associated with reduced levels of stress2, subjective improvement in cognitive functioning3, and a lower risk of cognitive decline4, mild cognitive impairment5, and dementia6,7,
While you’re on the ground, you can only observe the classic semi-circular rainbow (hence the word ‘bow’). However, when you’re flying in an airplane and looking down below, you can actually see a rainbow as a complete circle! If the weather circ
