When the Chicxulub impactor, a six-mile-wide asteroid, struck Earth 66 million years ago, it wiped out 75 percent of our planet's species. Today, if an asteroid of similar size were to strike, it would unleash catastrophic consequences, including shockwaves, tsunamis, seismic activity, and a darkened sky leading to freezing temperatures. NASA's Planetary Defense Coordination Office, in collaboration with the International Asteroid Warning Network, works diligently to detect, track, and assess the risk of nearby hazardous asteroids. Should such an asteroid approach, NASA would issue an alert to relevant authorities such as the White House for national threats and the United Nations Office of Outer Space Affairs for international concerns. With over 34,000 near-Earth asteroids identified thus far, NASA aims to predict their orbits decades in advance to implement defensive measures, such as deflecting or destroying the asteroid, to avert a potential apocalypse.