450 million years ago, there were about 415 days in a year. 4 billion years ago, the moon was 10 times closer to the Earth than it is today, and a day was approximately 6 hours long. Scientists have observed these changes and based them upon the interaction — a celestial dance — between the Earth and the moon. (If you want to listen to the full Radiolab podcast on this topic, click here). This information is intriguing and compelling to think about just on its own. But it also leads to a more philosophical point about the nature of life itself. Nothing is Forever: Diamonds The Earth The Sun The Moon Time Life These are all things that we take for granted to one extent or another as “forever.” I’ve always found the human mind to be incredibly fascinating because so many of us live our lives with a subconscious belief that we will live forever. That is, until we are directly confronted with the reality of our own impending demise. I think that this default pattern of thinking is inherently linked to being a human being. We view death as “that thing” that happens to people we read about or hear about — and sometimes even people we know — but don’t truly believe that it will happen to us. And this is why so many people put of their dreams; this is why people don’t travel; this is why people don’t set goals; this is why people squander their most precious resource: time. We also assume that the celestial bodies on which we reside will always exist, and will always remain the same. However, even stars and planets have limited life cycles. Even if takes billions of years, stars get hotter and hotter and then eventually explode….