Based on his State of the Union address, President Donald Trump’s plan to help Americans who are frustrated with the economy is to bore them to death with a torrent of lies. He was painting a fanciful ...
Earth's core is mostly made of the metals iron and nickel, but it also contains lighter elements like hydrogen, oxygen and silicon. CharlesC via Wikimedia Commons under CC-BY-3.0 How Earth got its ...
Scientists have long known that Earth's core is mostly made of iron, but the density is not high enough for it to be pure iron, meaning lighter elements exist in the core, as well. In particular, it's ...
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