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The Most Precious Metals on Earth
Avi Loeb: I used to jog every morning. The only surprise was I jog at sunrise. And suddenly, I noticed from my workout app on my watch that some days I jog slower than usual and some days faster. It's actually measuring the speed of the platform that I'm running on. So here is an object that made its way in interstellar space faster than 95% of the stars in the vicinity of the sun. If it were to collide with the Earth, head on.