Wired

The ‘Rolex on the Wall’ That Kissinger, Reagan, and Sinatra Loved, but You’ve Never Heard Of

Ronald Reagan gave one to Mikhail Gorbachev. Gerald Ford was a fan. Bill Nye The Science Guy keeps one in his New York apartment. Henry Kissinger and Frank Sinatra both owned one. Malcolm Forbes had ...
Hackaday

Geochron: Another Time, Another Timeless Tale

The Geochron World Time Indicator is a clock that doubles as a live map of where the sun is shining on the Earth. Back in its day, it was a cult piece that some have dubbed the “Rolex on the wall.” ...
Hackaday

A Look Inside The Geochron Clock

There are plenty of cool clocks out there, and maps by their very essence are cool, too. But a map that’s also a clock — or is it a clock that’s also a map? — has to be the coolest thing ever. Of ...
Nature

The enduring lead paradox

The position of the geochron depends only on the exact age of the Earth (and on the initial isotopic composition of its lead, as measured on iron meteorites); it is likely to be between 4.567 Gyr (the ...
insider.si.edu

global time clock, geochron

1993.3067 catalog number 1993.3067.01 Object Name Global Time Clock, Geochron See more items in Work and Industry: Mechanisms National Museum of American History Record ID nmah_1173675 Metadata Usage ...