Astrophysicists walk through some of the universe's most violent phenomena, using computer-generated sequences and everyday comparisons to explain forces that are otherwise impossible to picture. The series covers black holes and asks what wormholes could mean for time travel, then turns to a more grounded question: whether life on Earth could survive an asteroid strike on the scale of the one that ended the dinosaurs. Scientists also lay out what deep space travel actually demands of the human body, from radiation exposure to the sheer physical toll of leaving a planet built for us. Rather than settling on tidy answers, the series treats each topic as an open problem, showing researchers reasoning through evidence and disagreement in real time. The recurring thread is scale: how small human experience is against forces like gravitational collapse or a mass extinction event, and how much of the universe remains outside what current instruments and theories can actually confirm.