"Even though I walk through the darkest valley, I will fear no evil, for you are with me; your rod and your staff, they comfort me." (Psalm 23:4)   On the summer solstice, the sun reaches its highest point in the sky. It is the longest day of the year, a moment when the world is drenched in peak light. Yet, there is a strange scientific truth about this day. Because the sun sits at such a high, intense angle, it actually creates the most dramatic, elongated shadows you will see all yea...