A gold rush: Earth's precious minerals formed when another world collided with our planet 4.45 billion years ago
It has long been believed that Earth's precious metals, such as gold and platinum, formed on the planet over the course of several minor impacts.
But new research is challenging this theory, and suggests that a single huge collision with another world could be responsible for the precious metals.
The findings suggest that Earth's history could have been less violent than previously thought.
EARTH'S PRECIOUS METALS Earth has an unusually high proportion of precious metals near the surface, which is surprising, as they would usually be expected to settle down near the core of the planet.... read more
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