This is a poignant story about the end of humanity and one man's struggle to revive his species. He also happens to be the one who inadvertently ended his species' existence through the accidental release of an infertility virus. The story touches upon time travel and the dangers of biological research. Is it ultimately too dangerous to engage in DNA splicing and the creation of new viral life forms? We may find out, to our regret, in the not-too-distant future. It's a short story and does not require more than an hour or two, but you will find yourself yearning for more. Maybe the author can expand it out to a novel some day.