In the Movie, when Sector Seven was talking about NBE-1 (Megatron), they said that he probably crashed into the ice because when passing over the north pole, its magnetic fields scrambled his navigational systems. WHAT?!!! Megatron was the toughest of all Transformers in the movie, even Prime. He crashed because his navigation systems were screwed up, I strongly doubt that. Even if they were fried, he could have flown manually and landed fine. Something else was to blame for his crash. My answer, GRIMLOCK. While traveling through space chasing after the Allspark with feverish intent, Megatron was pursued by Autobot behemoth, Grimlock. Both of these mechanical titans fought each other tooth and nail through the empty void of space. Even though Megatron faired better in the struggle than Grimlock, both warriors entered Earth's atmosphere severely damaged. While succumbing to the Earth's gravitational pull, both slipped into stasis lock. In a scene reminiscent of the Axalon and Darkside's crash upon prehistoric Earth that sparked the Beast Wars, both Megatron and Grimlock rocketed to the planets surface in different directions. While Megatron pierced the Artic ice caps, Grimlock cometed into the mountainous region of what is now the state of Montana in the United States. Unlike Megatron, Grimlock's onboard computer searched feverishly to attain an Earth-based alternate form in order to prevent any further damage to the monstrous Autobot. The search found no suitable life forms that were still living. What the search did end up finding was the fossilized remains of the planet's once true king, a Tyrannosaurus Rex. In his new Beast Mode, Grimlock would sleep peacefully for thousands of years until one faithful day when he would be discovered by a couple of anxious scientists that were excavating the site.