00:04If I ask you what was the most expensive material known to man, you might say something like
00:08diamonds. But that's not the most costly. Not by a staggering long shot. And especially not
00:14to scientists. Often the most precious materials come from space. For instance, the rock and
00:18mineral samples that were recently brought back from the asteroid Bennu. That mission's total
00:22expenditure is expected to pass 1.16 billion dollars. And they only brought back 9 ounces
00:28of asteroid samples. According to professor of astronomy Chris Impey, that brings the total
00:32to 132 million dollars per ounce. Or roughly 70,000 times the price of gold. That's not
00:39even close to the most expensive material known to humankind. The astronomy professor explains
00:44the most costly material is antimatter. Antimatter occurs naturally, but only exists for fleeting
00:49moments. As antiparticles quickly meet particles and turn into radiation. However, particle accelerators
00:55can't produce it. But if you want to create a single ounce of them, it would take billions
00:59of years. Meaning one ounce would require the machine to be on for that time. At a cost
01:04of around a billion billion dollars.
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