Just two times each year--at an event called the solstice--Earth leans closest to our home star, the Sun. Since ancient times, people have used the Sun as a timekeeper. They knew that the length of daylight changes in a regular way, and celebrated the solstice as a signal of changing seasons. Solstice imparts scientific and cultural information using the global experience of a solstice as its scientific core, and the descriptions of children's lives...