Some believe that Stonehenge (2500 BCE) in England was built to help establish when the Summer Solstice occurred.
Males and Females sleep up to 18-20 hours a day in most cases. Depending on how hot or if the weather is perfect than the lion will sleep. If the weather is good ther will sleep about 14-18 hours and go hunting or playing.
I think mine sleep more than average â closer to the 18 hour limit. They sleep 8 hours a night with us. They sleep while we read or watch TV in the evening. And they sleep all day if we leave them inside. Iâd bet they are only awake 4-5 hours a day during a normal day.