What is iron? Atoms, elements, chemistry
Diagram of an iron atom When a red giant star finishes changing all of its helium into carbon and oxygen, it then starts to turn the carbon and oxygen atoms into iron atoms. Iron [...]
2
06, 2017
26
05, 2017
What are dinosaurs? Evolution and Biology
A dinosaur skeleton: evolution of dinosaurs When did dinosaurs evolve? The first dinosaurs evolved out of earlier types of chordate reptiles about 230 million years ago, on the big land [...]
26
05, 2017
Evolution of Mammals – Biology
Rat from New Zealand - Evolution of mammals When did the first mammals evolve? About 200 million years ago, when all the land on Earth was stuck together in one [...]
