How NASA’s asteroid-shattering technology could save YOU from a painful death by fiery shock wave, starvation or tsunami when a planet killer hits Earth. SHIVALI BEST’s video guide
<!–
<!–
<!– <!–
<!–
<!–
<!–
When NASA managed to smash a satellite into an asteroid last week, people around the world rejoiced that humanity could be saved if a huge rock in space is headed for Earth.
But will it really work if a planet-killing asteroid like the 6-mile-wide one that wiped out the dinosaurs is about to hit our planet? How much notice should NASA scientists need? And will they need nuclear weapons.
This is MailOnline’s video guide with the answers.