Captain John Steakley
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2 days ago · The Cretaceous–Paleogene ( K–Pg) extinction event, [a] also known as the Cretaceous–Tertiary(K–T)extinction, [b] was a sudden mass extinction of three-quarters of the plant and animal species on Earth, [2] [3] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
4 days ago · Many families of brachiopods, gastropods, bivalves, and marine reptiles also became extinct. On land a great part of the vertebrate fauna disappeared at the end of the Triassic, although the dinosaurs, pterosaurs, crocodiles, turtles, mammals, and fishes were little affected by the transition.
- Alan Logan
2 days ago · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. Most died out by the end of the Cretaceous Period. Many lines of evidence show that one lineage evolved into birds about 155 million years ago.
- Dinosaurs are a diverse group of reptiles that were the dominant terrestrial life form on Earth during the Mesozoic Era, about 245 million years ag...
- The decline of dinosaurs was most likely caused by many different factors. A popular theory is that an asteroid crashed into the Yucatán Peninsula...
- Some species of dinosaurs, such as the dromaeosaur, have fossil records of their feathers. Early feathers were not evolved for flight; instead, sci...
- It is generally accepted that modern birds are descendents of dinosaurs. Evidence for this theory first arose from the fossil records of the Archae...
- Although estimates vary, one of the contenders for the largest dinosaur is the Argentinosaurus. Discovered in Argentina in 1987, the Argentinosauru...
- Dinosaur fossils and tracks have been discovered throughout human history. The first description of dinosaurs as a separate group of life forms (kn...
4 days ago · The first dinosaurs. Plateosaurus, late Triassic dinosaur. A large herbivore, it may have reared up on its back legs and craned its long neck to browse on vegetation high above the ground. (more) Coelophysis, a late Triassic dinosaur, was among the earliest dinosaurs in North America.
- Alan Logan
3 hours ago · Brazilian scientists have discovered a skeleton of what they claim is one of the world’s oldest dinosaurs. The remains surfaced after heavy rains in the southern state of Rio Grande do Sul accelerated the terrain’s natural erosion. The fossil is believed to be around 233 million years old. RIO DE JANEIRO (AP) — A team of Brazilian ...
5 hours ago · RIO DE JANEIRO (AP) — A team of Brazilian scientists has discovered a skeleton of what they believe is one of the world’s oldest dinosaurs after heavy rains in the southern state of Rio Grande ...
1 day ago · Among other things, climate change melts Earth's ice caps and thus causes sea levels to rise. As for the Key Largo tree cactus, "This is the first of many losses likely to be suffered in the ...
