Donate

Kilogram

Kilogram standards

The kilogram is getting a new look

Culture

For now, the standard kilogram is a shiny little cylinder in Paris. Soon, that will change.

Silicon sphere

A kilogram just isn’t what it used to be — and it might never be again

Science

Official kilogram has put on a little weight

Environment

Why the Kilogram Is Getting Heavier

Tell us about your experience accessing The World

We want to hear your feedback so we can keep improving our website, theworld.org. Please fill out this quick survey and let us know your thoughts (your answers will be anonymous). Thanks for your time!

We respect your time, attention and privacy

This is a news website, not a click casino. We do NOT employ deceptive behaviors, display annoying ads or use third party cookies and trackers to monetize your visit or help advertisers track you across the internet.

Simply, we ask that you would consider a donation to support the journalism we produce every weekday. Thank you.

This is The World

The World is a public radio program and podcast that crosses borders and time zones to bring home the stories that matter.

Follow The World

Subscribe to The World’s Latest Edition podcast for free using your favorite podcast player: