The letter said: "To Whom It May Concern:

Hi, my name is Mark. I was born in 1955, and now I am 20. I am sure you're wondering why this capsule is full of items that haven't been invented yet. It's a long story, so let's start at the beginning. I first met Tamsin when I went to college in 1974. The first time I saw her she took my breath away. She wasn't just beautiful, she was whip smart too. Lucky me, she found me as equally attractive and smart as she was. We began seeing each other every day. After 6 months of dating, we began living together, in a little studio close to school. We would have long conversations about physics, time, space, among many other things. We had our arguments, like every couple, but we always worked it out.