The Y chromosome, the genetic key to all things male, is slowly fading into oblivion thanks to the relentless march of evolution. Over the last 166 million years, it has shed a whopping 1,600 genes, dwindling from a robust 900 to a paltry 55, and now, only 27 of those genes are still pulling their weight. This degeneration has scientists wondering if the Y chromosome might eventually vanish, leaving the future of men hanging by a genetic thread. However, recent studies on the spiny rat show that species can evolve new sex-determining mechanisms when the Y chromosome is lost, offering hope that humans may also develop alternative solutions to preserve the male population. Watch the video to know more.