Context and question: Copper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kilometer of Earth's crust, or about 5 million years' worth at the current rate of extraction). However, only a tiny fraction of these reserves is economically viable, given present-day prices and technologies. Various estimates of existing copper reserves available for mining vary from 25 years to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in the modern world. Because of these and other factors, the future of copper production and supply is the subject of much debate, including the concept of peak copper, analogous to peak oil.
How much of mined cooper has been extracted in the last 24 hours?
Answer: unanswerable
Context and question: The Cork School of Music and the Crawford College of Art and Design provide a throughput of new blood, as do the active theatre components of several courses at University College Cork (UCC). Highlights include: Corcadorca Theatre Company, of which Cillian Murphy was a troupe member prior to Hollywood fame; the Institute for Choreography and Dance, a national contemporary dance resource;[citation needed] the Triskel Arts Centre (capacity c.90), which includes the Triskel Christchurch independent cinema; dance venue the Firkin Crane (capacity c.240); the Cork Academy of Dramatic Art (CADA) and Graffiti Theatre Company; and the Cork Jazz Festival, Cork Film Festival, and Live at the Marquee events. The Everyman Palace Theatre (capacity c.650) and the Granary Theatre (capacity c.150) both play host to dramatic plays throughout the year.
What are someplaces that you could study drama and therter in Cork?
Answer: Cork Academy of Dramatic Art (CADA) and Graffiti Theatre Company
Context and question: However, leeches and their closest relatives have a body structure that is very uniform within the group but significantly different from that of other annelids, including other members of the Clitellata. In leeches there are no septa, the connective tissue layer of the body wall is so thick that it occupies much of the body, and the two coelomata are widely separated and run the length of the body. They function as the main blood vessels, although they are side-by-side rather than upper and lower. However, they are lined with mesothelium, like the coelomata and unlike the blood vessels of other annelids. Leeches generally use suckers at their front and rear ends to move like inchworms. The anus is on the upper surface of the pygidium.
What do leeches use to move?
Answer:
suckers at their front and rear ends