They do not learn anything, they are extinct.
I know about dinosaurs and their habitats from reading about them. Scientists learn about dinosaurs and their habitats by studying fossils.
You can learn more to make a sensible retirement investment at www.arfandia.com. Another good site is www.sensible-investor.com/principles_1.html
Because it is a sensible system used by most countries in the world.
So we can learn more about the past and what lived in the past.
All terrestrial vertebrates require some form of sleep. We can't learn about how dinosaurs slept from their fossils, but because birds and crocodiles, their closest relatives, sleep, it is safe to assume all dinosaurs did, too.
sensible is an adjective
The comparative form for "sensible" is "more sensible" and the superlative form is "most sensible."
Scientists learn about dinosaurs by studying their fossils and those of other contemporary organisms. This helps them to learn what a dinosaur looked like, what it ate, and what its adaptations were. They also learn about what the climate, plant life, and other animals it interacted with were like. Fossils such as those of eggs, nests, and footprints can leave clues as to a dinosaur's social behavior.
Birds are the only surviving example of dinosaurs. Some extinct herbivorous dinosaurs include sauropods, ankylosaurs, stegosaurs, hadrosaurs, hypsilophodonts, iguanodonts, and therizinosaurs. Examples of extinct carnivorous dinosaurs include Tyrannosaurs, oviraptorids, Troodon, Allosaurus, and Carnotaurs. See the related links to learn more about each of these.
The only sensible reason for learning a language is if you have a use for it. If you live in Sri Lanka, Sinhalese is a necessity - and it is much more sensible to learn Sinhalese than English. If you live in Huddersfield, you need to learn English - Sinhalese is not much use to you. So the question is: where do you live, and who do you want to speak to. Learn the language that allows you to say what you want to say, to the people you need to say it to.
"Sensible" in French is "sensé" or "raisonnable."
The antonym of sensible is irresponsible