B9. Many people believe that dinosaurs have became extinct because of a giant meteorite. 310. However, this theory is not universally accepted by all scientists. Some others experts B11. suggest that climate change or volcanic activity have been played a bigger role. B12. Fossils, which are the remains of ancient creatures, can tell to us a lot about how they B13. lived and what the Earth looked like a few billiard years ago. By studying them, B14. we can much learn about the past environments and how different species adapted to them. B15. Museums around the world display the fascinating objects for these public to see. B16. If you ever have a chance to visit lots natural history museums, it is really worth going. B17. You will be able either to see skeletons of huge creatures that once roamed our planet and B18. to imagine enough what it would be like to live alongside them.