All topics beginning with T: 1-8 of 8 First | ‹‹ Prev | Next ›› | Last
- Tectonics
- See "Plate Tectonics"
- Tentanurae
- A group of dinosaurs that had stiff tails as a result of ossified tendons running along the tail vertebrae. This helped with balance, particularly when a quick change of direction was needed to chase prey. It is this group that is thought to have evolved into birds, as the stiff tail would have been a necessary step in developing the ability to fly.
- Tethys Sea
- This was a great seaway that appeared between the northern and southern continents during the Late Jurassic and Early Cretaceous. As plate tectonics pulled the Pangaea landmass apart, the Tethys Sea formed. It would have dramatically changed ocean currents and was most likely a contributor to the mass extinction of sea life, such as ammonites.
- Therapsid
- The scientific term which is used to classify most Mammal-Like Reptiles
- Theropod
- The word Theropod is used to describe many dinosaurs. Theropod dinosaurs shared a number of characteristics:
- Thylacosmilus
- Thylacosmilus atrox is a very interesting creature. It looked like the famous saber-toothed cats, but it was actually a marsupial, which means it is a close relative of kangaroos. This ferocious-looking animal probably had a pouch in which it carried its young.
- Trilobite
- Trilobites are long-extinct sea creatures that were one of the most common forms of life in the sea during the Paleozoic Era. There is nothing exactly like them living today, but the horseshoe crab comes the closest. Because they had a hard shell covering their bodies, and because they were very abundant, they are one of the most common fossils found. Trilobites derive their name from the three basic sections that formed their bodies. They varied greatly in size and appearance. Some were less than an inch (2.5 cm) long, others approached a foot (30 cm) in length. Some Trilobites had very plain shells, while others had lots of projections and little spines. There were even Trilobites with no eyes. The number of legs they had depended on how many body segments the particular species had.
- Type Specimen
- See "Holotype"
All topics beginning with T: 1-8 of 8 First | ‹‹ Prev | Next ›› | Last
Copyright © 2008 Yahoo! Inc. All rights reserved.
Copyright/IP Policy
| Terms of Service
| Help
NOTICE: We collect personal information on this site.
To learn more about how we use your information,
see our >> Privacy Policy.