(NPR) Robert Krulwich–The Hardest Thing To Find In The Universe?
What is rarer than a shooting star? Rarer than a diamond? Rarer than any metal, any mineral, so rare that if you scan the entire earth, all six million billion billion kilos or 13,000,000,000,000,000,000,000,000 pounds of our planet, you would … Continue reading (NPR) Robert Krulwich–The Hardest Thing To Find In The Universe?
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