This is actually true! The Younger Dryas Impact is also known as the "Second Impact". The Second impact was the second of three major events taking place on Earth as a result of intervention by the First Ancestral Race. The event took place as a result of the Contact Experiment. The experiment reawakened Adam, generating an explosion that melted the Antarctic ice caps and shifted the Earth's axis. The scientists subdued Adam, but they were only successful in limiting the damage and averting humanity's complete extinction. The resulting sea level rise, tsunamis, and armed conflicts eventually wiped out half of the human population, and had massive geopolitical implications for the nations of the Earth.

I strongly recomend watching the documentary about it.