Set after the events of Continental Drift, Scrat’s epic pursuit of his elusive acorn catapults him outside of Earth, where he accidentally sets off a series of cosmic events that transform and threaten the planet. To save themselves from peril, Manny, Sid, Diego, and the rest of the herd leave their home and embark on a quest full of thrills and spills, highs and lows, laughter and adventure while traveling to exotic new lands and encountering a host of colorful new characters.
I have a weird idea about the 'nuke' that went off during centipeedle and Lapis' story. If the diamonds set off this nuke to kill all gems on earth then surely they would think that the earth was uninhabited again. This is the bit I don't understand. Why didn't they come back and colonise the earth. They obviously had need for it to attack it in the first place. I was stuck on this and wondering if you had any theories