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Uno Dos of Trace: Scientists Are Eliminating the Kilogram! So, What Happens Next?

6 minutes 3 seconds

Now Playing As: Captioned (English) (change)

Hidden in a vault outside Paris, vacuum-sealed under three bell jars, sits a palm-sized metal cylinder known as “Le Grand K.” Forged in 1879 from an alloy of platinum and iridium, it was hailed as the perfect kilogram—the gold standard by which other kilograms would be judged. However, it is wasting away, and scientists are scrambling for a more reliable standard. Part of the "Uno Dos of Trace" series.

Media Details

Runtime: 6 minutes 3 seconds

Topic: Mathematics, Science
Subtopic: Mathematics, Science Methods
Grade/Interest Level: 11 - 12
Release Year: 2018
Producer/Distributor: Trace Dominguez
Series: Uno Dos of Trace
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Trace is standing in front of a book shelf. Caption: Also, how does it adjust that temperature once it knows it.

Closeup of host Trace Dominquez wearing a red polo shirt and clear glasses smiling and looking up. A bright, square light on a stand is in front to his left, angled upward. Caption. So they would sit under a light.

Trace is standing with his right shoulder facing the book shelf. Caption: A la the Scully effect, which is just the best, but is it real.

Trace wears safety goggles and has a hammer in his hand. Caption: Ow.

Trace is standing in front of a book shelf. Caption: Genetic engineering is complex, and it's wide reaching.

Trace holds reusable bottles and coffee mugs in his hands. Caption: I think reusable bottles might be bad for the environment,

A mouse nibbles the food particle holding it in its claws. Caption: The nanoparticles gave the mouse the ability to see infrared.

Trace wears scarfs around his shoulders and talks. Caption: We are here, today, to lay to rest the kilogram.

Animation of red blood cells in a blood vessel. Caption: Red blood cells are eight picometers,

Host Trace Dominquez, a man with short black hair, brown glasses, and a black shirt, sits and talks in front of a busy bookshelf. Text on screen reads, "Modulator. Demodulator." Caption. Modem is actually a compound word for modulator slash demodulator.