Before man ruled the world, Earth was a land of giants. Count down the biggest beasts of their kind to ever roam the planet in this eye-opening original special, and uncover the secret lives of these super-sized species. Birds with plane-length wingspans, dinosaurs rivaling a Boeing 737; this stunning CGI special goes in search of the truth behind these monsters, counting down ...十大(👇)巨兽排行榜十大巨兽排(♋)行榜十大(🐿)巨兽排行(👿)榜