Paleontology is the study of prehistoric life. The term itself originates from Greek παλαιός, palaios, i.e. "old, ancient", ὄν, on (gen. ontos), i.e. "being, creature" and λόγος, logos, i.e. "speech, thought, study". Remains of ancient plants and animals are called fossils. Fossils are studied and excavated by scientists, paleontologists. Paleontology consists of many branches, which include but are not limited to paleobotany, vertebrate and invertebrate paleontology, micropaleontology, biostratigraphy, ichnology, etc.
Eras and periods
First ''era'' of prehistoric multicellular life is called Proterozoic. 650 million years ago(mya) a mass extinction happened(mass extinction-is a period when many spieces of animals or plants die). After extinction, new spieces named vendobionts appeared. Next 550 mya, after the death of vendobionts, new era begun-Paleozoic. After another mass extinction Mezozoic era started. Now dinosaurs rule. After they became extinct, Cenozoic era begun. People appear.
Main predator:Sea scorpion
Main predator:Armoured fish
Main predator:Giant dragonfly
Main predators:Dinosaurs(see below)
Main predators:Saber-tooth tiger,human.
Dinosaurs are extinct animals who resemble reptiles, but are more closely related to birds. They lived in the Mesozoic Era, from 230 million years ago to 65 million years ago(throughout Triassic, Jurassic and Cretaceous periods). They are descendants of the Archosaurs, who were the reigning creatures of prehistoric times. Examples of dinosaurs include the Tyrannosaurus Rex, Stegosaurus, Velociraptor, Deinonychus, etc.
1818 - In USA was found first dinosaur trackway.In UK bones of Iguanodon are found.
1822 - Megalosaurus is named.
1824 - Iguanodon is named.
Dinosaurs appeared 230 million years ago.Their ancestors were crocodile-like, and walked on 4 legs (they were quadrupedal).Some dinosaurs,howewer, were two-legged (bipedal).
1968 John Ostrom finds 4 Deinonychus near the Tenontosaurus(Deinonychus is a predator).
1915;1927 The largest land dinosaurs-carnivores are discovered :Spinosaurus(18 metres;20-25 tonns);Carcharodontosaurus(16 metres;8-9 tonns).
- "Jurassic Fight Club"
- "Walking with dinosaurs"
- "Animal armaggedon'
- Controversies in Science/What killed the dinosaurs
- Wikijunior:Dinosaurs (Wikibooks)
- Dinosaur (Wikipedia)
- Dinosaur (Simple Wikipedia)
- Major questions (Wikibooks)
- Dinosaur learning activities (Google search)
- The open dinosaur project
- http://www.paleodirect.com/dino.htm (Photos of dinosaur fossils)
- paleontology. Online Etymology Dictionary.