Survex and dates

[Olly Betts]

On Sun, Aug 08, 2010 at 04:49:24PM +0100, Andy Waddington wrote:
> Sometime before sending, Mark Shinwell typed (and on Wednesday 2010-07-28 sent):
> > the 64-bit
> > version goes back older than any cave.
> 
> Even pre-glacial ones ?

Actually yes - the Earth is generally thought to be about 4.5 billion
years old, and the universe something like 14 billion years.

A 64-bit signed time_t allows you to go back to before 292 billion
years BC.

So unless you've found a way to get to an older universe and found a
really old cave there...

Cheers,
    Olly