Allosaurus
- When: Late Jurassic
(155–145 mya) - Where: North America
- What: Theropod
- Weight: 2–4 tons
- Length: 8–12 meters
- Diet: Carnivorous
- Discovered: 1877
Mesozoic
The Mesozoic Era: The Age of Dinosaurs
The Mesozoic Era is a thrilling time in Earth’s history, known as the Age of Dinosaurs!
It began about 250 million years ago and lasted until 66 million years ago.
During this era, dinosaurs roamed the land, flying reptiles soared through the skies, and giant sea creatures swam in the oceans.
The Mesozoic is divided into three periods: the Triassic, the Jurassic, and the Cretaceous.
Each period saw amazing changes in the types of plants and animals that lived on Earth. Imagine a world full of enormous, plant-eating dinosaurs like Brachiosaurus, fearsome predators like T. rex, and even the first birds beginning to take flight!
The Mesozoic was a time of incredible adventure and discovery, making it one of the most exciting chapters in our planet’s history.
Argentinosaurus
- When: Late Cretaceous
(93–89 mya) - Where: South America
- What: Sauropod
- Weight: 70–100 tons
- Length: 30–35 meters
- Diet: Herbivorous
- Discovered: 1993
Baryonyx
- When: Early Cretaceous
(130–125 mya) - Where: Europe
- What: Theropod
- Weight: 1.2–1.7 tons
- Length: 7.5–10 meters
- Diet: Carnivorous
- Discovered: 1986
Ichthyosaurus
- When: Early Jurassic
(199–190 mya) - Where: Europe
- What: Ichthyosaur
- Weight: 180 kg
- Length: 2–3 meters
- Diet: Piscivorous
- Discovered: 1825
Iguanodon
- When: Early Cretaceous
(139–124 mya) - Where: Europe
- What: Ornithopod
- Weight: 3–5 tons
- Length: 9–11 meters
- Diet: Herbivorous
- Discovered: 1825
Plesiosaurus
- When: Early Jurassic
(199–175 mya) - Where: Europe
- What: Plesiosaur
- Weight: 450 kg
- Length: 3.5 meters
- Diet: Piscivorous
- Discovered: 1821
Pterodactylus
- When: Late Jurassic
(150.8–148.5 mya) - Where: Europe
- What: Pterosaur
- Weight: 1–2 kg
- Length: 1.5 meters
- Diet: Carnivorous or piscivorous
- Discovered: 1809
Quetzalcoatlus
- When: Late Cretaceous
(68–66 mya) - Where: North America
- What: Pterosaur
- Weight: 200–250 kg
- Length: 10–11 meters
- Diet: Likely piscivorous or scavenged
- Discovered: 1975
Styracosaurus
- When: Late Cretaceous
(75–74 mya) - Where: North America
- What: Ceratopsian
- Weight: 3 tons
- Length: 5–5.5 meters
- Diet: Herbivorous
- Discovered: 1913