Earliest sailors did not travel far from home, and they stayed close to shore so that they would not get lost. The soft mellow light of twilight is caused by the refracted rays of the sun, which in the evening continue to reach the earth's surface until the sun reaches a point about eighteen degrees below the horizon. Twilight always lasts about one hour at the equator. Elephants are capable of doing very hard work. They can be used in the jungles where machines cannot go.
Most scientists still reject the idea that the dead return to earth as spirits.
They do not doubt that the people who report having seen ghosts have seen them, but they believe that the existence of ghosts, except in the minds of people, is not proved and, moreover, is unlikely. Scientists believe that such phenomena should be investigated. A child is nature's fresh picture newly drawn in oil, which time, and much handling, dims and defaces. If the temperature of gases remains unchanged, an increase of pressure will decrease the volume proportionately or vice versa. But if the temperature rises, then either the pressure or the volume or both will increase.