Thank You for my D Penny Whistle. It is beautiful in both craftsmanship and sound. Yours is my seventh D whistle, as I have been looking for a particular tonal quality. The whistle you sent me has the sweet resonance I was looking for in the instrument.
Frequent Short Naps. People used to believe that giraffes never sleep; this was disproven by researchers in the 1950s. They found that giraffes sleep both lying on the ground and standing. They sleep for short periods that last from two and a half to six minutes, and they get a total of about four and a half hours of sleep in every 24-hour period.
As the night progresses, individuals spend increasingly more time in REM sleep and correspondingly less time in deep sleep. How long is a sleep cycle? The first sleep cycle takes about 90 minutes. After that, they average between 100 to 120 minutes. Typically, an individual will go through four to five sleep cycles a night. What Is Deep Sleep? Stages 3 and 4 are referred to as deep sleep, slow wave sleep, or delta sleep.