About
A field guide to the planet under your feet
Our Eons is about how big the Earth is, how old it is, and what it does to us. It tries to make you feel the scale, not just read the number.
What it is
Two journeys sit at the centre of the site. Surface to Core drops you 6,371 km to the middle of the planet at true scale, one screen for every 100 km. The Walk lays 4.54 billion years along a path, one metre for every million years. Around them are short lessons that explain how we know what we know.
It is written for anyone curious, and for students working towards GCSE geography and beyond. It is not linked to any exam board.
How it is made
Every figure comes from a named source, listed on the page that uses it and on Sources. Every drawing and animation is made in code for this site. There are no photographs yet; when there are, each will carry its credit and licence.
The site has no adverts, no accounts and no tracking. It does not count visitors. The only thing it remembers is your motion setting, in your own browser. See Privacy.
If you prefer less movement, use the Motion switch at the top of every page. It starts from your device's own setting.
Who runs it
Our Eons is run by FALLINGHIPPO LIMITED, a software company registered in England and Wales, company number 17415391. Registered office: 71-75 Shelton Street, London, England, WC2H 9JQ.
Email hello@fallinghippo.com with corrections, ideas or anything else.