A. Natural History and Permian Period
correct answer isA. Natural History and Permian Period
I read an unordinary article about dinosaurs. I read an extraordinary article about dinosaurs.
Natural History and Cretaceous Period
Astronomy is the study of Stars, Space, Moon, Sun and the universe.
There are lots of such words. I suggest you either read an introductory article on Astronomy, for example on Wikipedia; or do a Google search for "Astronomy glossary".
(mythology) The Greek name for the Egyptian mythological figure. The Egyptian name is w:Apep, Apep.(astronomy) A near-earth asteroid designated with the permanent number 99942. There is a Wikipedia article on W:99942 Apophis, 99942 Apophis.
A. Natural History and Permian Period
You can identify some of them from the article linked.
This is an article that is published for non-scientists. This helps them to understand certain things without all of the scientific jargon that is confusing.
natural history and permian period
The Wikipedia article, http://en.wikipedia.org/wiki/Astronomy, gives some of the subfields. There you will also find links to more specific articles.
The mass extinction that is believed to have eliminated larger dinosaurs 65 million years ago. Smaller dinosours survived, their descendants are today's reptiles. The mass extinction is believed to have been caused by an asteroid that collided with Earth. For more information, read the Wikipedia article on "Cretaceous-Paleogene extinction event", or search for this term on your favorite search engine.