VIDEO: The definition of a kilogram has officially changed

50-plus countries voted to a ground-breaking overhaul to the international system of measurements

A replica of the International Meter Prototype is pictured at the International Bureau of Weights and Measures, in Sevres, near Paris. (AP Photo/Christophe Ena)

In a historic vote, nations on Friday unanimously approved a ground-breaking overhaul to the international system of measurements that underpins global trade and other vital human endeavours, uniting together behind new scientific definitions for the kilogram and other units in a way that they have failed to do on so many other issues.

Scientists, for whom the update represents decades of work, clapped, cheered and even wept as the 50-plus nations gathered in Versailles, west of Paris, one by one said “yes” or “oui” to the change, hailed as a revolution for how humanity measures and quantifies its world.

The redefinition of the kilogram, the globally approved unit of mass, was the mostly hotly anticipated change. For more than a century, the kilogram has been defined as the mass of a cylinder of platinum-iridium alloy kept in a high-security vault in France. That artefact, nicknamed “Le Grand K,” has been the world’s sole true kilogram since 1889.

But now, with the vote, the kilogram and all of the other main measurement units will be defined using numerical values that fit handily onto a wallet card. Those numbers were read to the national delegates before they voted.

Scientists at the meeting were giddy with excitement: some even sported tattoos on their forearms that celebrated the science.

Nobel prize winner William Phillips called the update “the greatest revolution in measurement since the French revolution,” which ushered in the metric system of meters and kilograms.

Jon Pratt of the U.S. National Institute of Standards and Technology said the vote left him “a basket case” and “extremely emotional.”

“Those units, those constants chosen now, include everything we know, everything we have always known and provide that springboard for us to go pursue those things that we don’t know,” he said. “That was just leaving me in a puddle of tears.”

The Grand K and its six official copies, kept together in the same safe on the edge of Paris and collectively known as the “heir and the spares,” will be retired but not forgotten. Scientists want to keep studying them to see whether their masses decay over time.

The change will have no discernable impact for most people. Bathroom scales won’t suddenly get kinder and kilos and grams won’t change in supermarkets.

But the new formula-based definition of the kilogram will have multiple advantages over the precision-crafted metal lump that set the standard from the 19th century to the 21st, through periods of stunning human achievement and stunning follies, including two world wars.

Unlike a physical object, the new formula for the kilo, now also known as “the electric kilo,” cannot pick up particles of dust, decay with time or be dropped and damaged.

It is expected to be more accurate when measuring very, very small or very, very large masses and help usher in new innovations in science, industry, climate study and other fields.

With time, as the science behind the new definition becomes more accessible and affordable, it should also mean that countries won’t have to send their own kilograms back to France to be checked occasionally against Le Grand K, as they have done until now, to see whether their mass was still accurate.

John Leicester, The Associated Press

Like us on Facebook and follow us on Twitter

Just Posted

Alberta Election called for April 16th

Upcoming election will be about who is fit to be Premier, says Notley

Red Deer athletes qualify for Pan Am Games in Lima, Peru

The official Pan American Games will be held from July 26th to Aug. 11th

Local youngsters lend a helping hand to the Red Deer Hospital

First Steps and Beyond School students donate to Neonatal Intensive Care Unit

Red Deer RCMP arrest man during break and enter in progress

RCMP found two males in the parking garage attempting to steal a vehicle

Red Deer RCMP announce new Officer in Charge

Grobmeier has 26 years of service with the RCMP where he has moved through the ranks across Canada

Five highlights in the 2019 federal budget

Latest budget includes a sprinkling of money for voters across a wide spectrum

2019 BUDGET: As deficit grows, feds spend on job retraining, home incentives

Stronger economy last year delivered unexpected revenue bump of an extra $27.8 billion over six years

Newfoundland man caught after posting photo of himself drinking and driving

The 19-year-old took a photo of himself holding a beer bottle and cigarette while at the wheel

Here are five political leaders campaigning in Alberta’s spring election

Rachel Notley, Jason Kenney, Stephen Mandel, David Khan, and Derek Fildebrandt

UPDATE Leduc RCMP say sexual assault claim was false

UPDATE Leduc RCMP say investigation revealed sexual assault never took place

Fought to unite Alberta conservatives: Former MP Kenney ready to run for premier

Kenney, 50, was born in Oakville, Ont., raised in Saskatchewan, and spent his adult years in Alberta

Alberta Premier Rachel Notley wants chance to ‘finish that job’

Notley, 54, is the daughter of the late Grant Notley, who led the NDP from 1968 to 1984

PHOTOS: Massive fire at Wetaskiwin’s Rigger’s Hotel

Multiple fire departments involved, building badly damaged

Alberta government announces further easing of oil production restrictions

The government said it will continue to monitor the market and its response to the increases

Most Read