Power Rangers Dino Thunder is an American adaptation of Bakuryu Sentai Abaranger.
Former Power Ranger Tommy Oliver had focused his new career goals on being a paleontology and his friend Anton Mercer was working on Dino DNA projects. One of the projects exploded and changed Anton into a human/dinosaur hybird called Mesogogg. Tommy, and three of his student tapped into amazing powers using "dino gemes" that gave them the powers of the dinosaurs and made them the Power Rangers Dino Thunder. Anton's son Trent found a white Dino Gem and became the evil White Dino ranger, before he was freed from its evil influence and was able to use his powers for good to fight the evil creature his father had become. Along the way the Rangers would discover new teens with Dino Gems and Zords to enhance their team.