The reason we have seasons is because, during its journey around the Sun, the Earth is tilted.
For indigenous peoples, winter solstice has been a time to honor their ancient sun deity. Their rituals reveal a deep understanding of the natural world.
How did civilization emerge from small groups of hunter-gatherers? Some archaeologists focus on cooperation as the vital ingredient – and find evidence for it in the form of feast-related artifacts.
The tilt of Earth's axis as it orbits the sun results in the seasonal changes.