It's a fight between two fierce armored reptiles! Today's crocodiles are powerful, sneaky hunters. But millions of years ago, the deinosuchus was one of the biggest predators of its time. Learn what makes these similar beasts so dangerous. Then decide which of the fearsome foes would emerge victorious in a beastly brawl.

It's a battle between two terrifying, tooth-filled predators! The great white shark is today's largest predatory fish. But millions of years ago, megalodon ruled the seas as the ocean's deadliest hunter. Learn what makes these similar monsters of the sea so deadly. Then decide which one would triumph if they battled in the ocean's depths.

Halloween is a holiday that features all things creepy and scary! Also known as All Hallows' Eve, people enjoy decorating their homes with jack-o'-lanterns, spider webs, skeletons, and other creepy items. Many kids love to dress up in costumes and go trick-or-treating for candy. Some people enjoy watching scary movies. Discover how this holiday began and the spooky ways people have fun with it.

Halloween is a holiday that features all things creepy and scary! Also known as All Hallows' Eve, people enjoy decorating their homes with jack-o'-lanterns, spider webs, skeletons, and other creepy items. Many kids love to dress up in costumes and go trick-or-treating for candy. Some people enjoy watching scary movies. Discover how this holiday began and the spooky ways people have fun with it.

People all over the world celebrate the New Year. It's a holiday that celebrates new beginnings and the hope for a prosperous year ahead. People love gathering at parties to usher in the new year with fireworks, music, New Year's resolutions, and more. Learn about the many ways people around the world count down the final moments of the old year, and how they celebrate the birth of a brand-new year.

People all over the world celebrate the New Year. It's a holiday that celebrates new beginnings and the hope for a prosperous year ahead. People love gathering at parties to usher in the new year with fireworks, music, New Year's resolutions, and more. Learn about the many ways people around the world count down the final moments of the old year, and how they celebrate the birth of a brand-new year.

It's a clash between two horned beasts! The rhinoceros is one of the largest animals living on land today. But millions of years ago, the triceratops was one of the biggest and most powerful beasts of its time. Learn what makes these similar creatures so impressive. Then decide which tanklike beast would achieve victory in a fight.

It's a battle between two fearsome, fanged beasts! Today, the Siberian tiger holds the record as the world's biggest cat. But in prehistoric times, the saber-tooth cat held that title as it prowled the land for prey. Learn what makes these similar animals such effective hunters. Then decide which fierce fighter would best the other in battle.