The rings of Saturn have dazzled humans ever since they were spotted by Galileo, but they still contain many unexplained mysteries, such as how old they are. One theory states that they date back approximately 4.6 billion years; another suggests that they’re just 100 million years old. Scientists backing the younger theory contend that the rings should show more evidence of space debris from the Kuiper Belt, which would make them darker than they appear today. Proponents of the older... [read more]