http://blogs.scientificamerican.com - Today is the Jewish holiday of Yom Kippur. Although it is often called the “holiest day of the Jewish year,” what is notable about Yom Kippur is not the fact that it is particularly holy, nor is it the fact that many Jews you know might be particularly hungry today. Yom Kippur is notable because it is really all about the unequivocal importance of one thing — atonement. We sit in our religious services all day, reflecting on the need to atone for our sins. However, it is stressed that we cannot just do this by showing up to services and praying. We must also directly ask for forgiveness from those that we have wronged in the past year; and, in turn, we must be willing to grant forgiveness to those whom we believe have wronged us.