Astrophysics and medical pathology don't, at first sight, appear to have much in common. What do sunspots have to do with liver spots? How does the big bang connect with cystic fibrosis? Talking from their home in Palo Alto, California, they explain how everything in us originated in cosmic explosions billions of years ago, how our bodies are in a constant state of decay and regeneration, and why singer Joni Mitchell was right. Iris: Was she ever!
Is Carbon Dating Accurate?
How Carbon Dating Works | HowStuffWorks
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ERRORS ARE FEARED IN CARBON DATING
Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.
The world's biggest island has huge resources of metals known as 'rare earths,' used to create compact, super-strong magnets which help power equipment such as wind turbines, electric vehicles, combat aircraft and weapons systems. The metals are abundant globally, but processing them is difficult and dirty - so much so that the United States, which used to dominate production, surrendered that position to China about 20 years ago. As Greenland's ice sheet and glaciers recede, two Australia-based mining companies - one seeking funding in the United States, the other part-owned by a Chinese state-backed firm - are racing for approval to dig into what the U. The contest underscores the polluting side of clean energy, as well as how hard it is for the West to break free of China in production of a vital resource.