Several answers to this challenge talk about two types of time. The Maharal reminds us that time, being that it is a part of the created world, is a relative concept[14], and indeed, according to relativity theory, it expands and contracts[15]. This allows Dr. Gerald Schroeder to calculate that about 15 billion years in the center of the universe translates into 6 days on the edge of the universe, where the much heavier gravity slows time down significantly. Rabbi Aryeh Kaplan comes up with a similar answer based on traditional sources[16].