If an asteroid is coming for Earth… what would we really do? Imagine, it’s 2034, and a rock the size of a mountain, far off in our solar system is on a direct impact course for Earth. How would we know? And what would we actually DO about it? In this video, we play out a fictional asteroid headed for Earth – with help from my friend and former NASA engineer Mark Rober and rare access into a remote facility where they discover NEW asteroids – to show you all the real science and tech we would use to defend our planet if an asteroid is about to hit Earth! [SPOILER] Our rock was published in the Minor Planet Electronic Circular (MPEC) here! MPEC 2025-K125 : 2025 KS6