James Vincent

It was originally 1 ten millionth of the distance from the North Pole to the equator. The motivation for that, they wanted a unit that was going to be defined by something unchanging and something that was accessible to everyone.

It was originally 1 ten millionth of the distance from the North Pole to the equator. The motivation for that, they wanted a unit that was going to be defined by something unchanging and something that was accessible to everyone.

It was originally 1 ten millionth of the distance from the North Pole to the equator. The motivation for that, they wanted a unit that was going to be defined by something unchanging and something that was accessible to everyone.

The big thing that they changed is that the kilogram used to be based on a physical standard. So there was such a thing as the kilogram. It was created along with the meter and the other units of the metric system during the French Revolution.

The big thing that they changed is that the kilogram used to be based on a physical standard. So there was such a thing as the kilogram. It was created along with the meter and the other units of the metric system during the French Revolution.

The big thing that they changed is that the kilogram used to be based on a physical standard. So there was such a thing as the kilogram. It was created along with the meter and the other units of the metric system during the French Revolution.

And that eventually became what is officially known as the Système International or the SI, which has a lot of more units in it, but it's basically the metric system. And these units used to be based on physical standards. There was a kilogram, there was a meter. So everything, every unit in the world, every kilogram in the world was, technically speaking, a copy of this physical kilogram.

And that eventually became what is officially known as the Système International or the SI, which has a lot of more units in it, but it's basically the metric system. And these units used to be based on physical standards. There was a kilogram, there was a meter. So everything, every unit in the world, every kilogram in the world was, technically speaking, a copy of this physical kilogram.

And that eventually became what is officially known as the Système International or the SI, which has a lot of more units in it, but it's basically the metric system. And these units used to be based on physical standards. There was a kilogram, there was a meter. So everything, every unit in the world, every kilogram in the world was, technically speaking, a copy of this physical kilogram.

And it was a small little weight made of platinum iridium alloy, about the size of a hen's egg, very small because the metal is so dense because it's meant to be unchanging over time.

And it was a small little weight made of platinum iridium alloy, about the size of a hen's egg, very small because the metal is so dense because it's meant to be unchanging over time.

And it was a small little weight made of platinum iridium alloy, about the size of a hen's egg, very small because the metal is so dense because it's meant to be unchanging over time.

and they kept it in a vault underground vault near Paris in Versailles and they had two of them over the centuries and then in sort of the middle of the 20th century they discovered that the most recent one which is known as the international prototype kilogram was losing weight and it wasn't losing much weight it was losing about 50 micrograms which is about the weight of a single eyelash

and they kept it in a vault underground vault near Paris in Versailles and they had two of them over the centuries and then in sort of the middle of the 20th century they discovered that the most recent one which is known as the international prototype kilogram was losing weight and it wasn't losing much weight it was losing about 50 micrograms which is about the weight of a single eyelash

and they kept it in a vault underground vault near Paris in Versailles and they had two of them over the centuries and then in sort of the middle of the 20th century they discovered that the most recent one which is known as the international prototype kilogram was losing weight and it wasn't losing much weight it was losing about 50 micrograms which is about the weight of a single eyelash

But in the sort of the high precision world of scientific metrology, the science of measurement, it's pretty consequential. So what they did is that they redefined the unit. So it's no longer based on a physical object, but it's based on universal constants, in this case, quantum constants. So these are sort of calculations or figures that we think are unchanging throughout reality.

But in the sort of the high precision world of scientific metrology, the science of measurement, it's pretty consequential. So what they did is that they redefined the unit. So it's no longer based on a physical object, but it's based on universal constants, in this case, quantum constants. So these are sort of calculations or figures that we think are unchanging throughout reality.

But in the sort of the high precision world of scientific metrology, the science of measurement, it's pretty consequential. So what they did is that they redefined the unit. So it's no longer based on a physical object, but it's based on universal constants, in this case, quantum constants. So these are sort of calculations or figures that we think are unchanging throughout reality.

So, for example, the meter used to be based, as the kilogram was, on a physical standard. And eventually they found that this was too imprecise. So they moved it to this sort of definition based on the distance traveled by light. So it's essentially it's tied to the speed of light.

So, for example, the meter used to be based, as the kilogram was, on a physical standard. And eventually they found that this was too imprecise. So they moved it to this sort of definition based on the distance traveled by light. So it's essentially it's tied to the speed of light.