They landed at the mouth of the Columbia River, Astoria, Oregon on November 5 1805. Lewis and Clark, sadly, did not actually see the Pacific Ocean. They landed at the mouth of the Columbia River, Astoria, Oregon on November 7 1805. Lewis and Clark, sadly, never did see the Pacific Ocean. The day was rainy and foggy, and the Columbia River estuary was four or five miles wide and they could not see the Oregon side of the river or Point Adams at the mouth of the river in the distance. But they were close enough to have reached their goal.
Some studies have shown that your deep sleep should at least be 20% of your overall sleep. It means that since most adults need 8-9 hours of sleep, they will need about 1.6-1.8 hours of deep sleep to feel fully functional next day. However, the time of deep sleep is changed and that's mainly due to the change in the sleep need of different group of people. For instance: Age Group.
Sleeping at a time that is in sync with this rhythm is important for healthy sleep. Sleep needs change over a person's lifetime. Children and adolescents need more sleep than adults. Interestingly, older adults need about the same amount of sleep as younger adults -- seven to nine hours of sleep per night. Unfortunately, many older adults often get less sleep than they need. One reason is that they often have more trouble falling asleep. A study of adults over 65 found that 13 percent of men and 36 percent of women take more than 30 minutes to fall asleep.