[ExI] mayan forecast

[Adrian Tymes]

On Fri, Dec 21, 2012 at 11:16 AM, Giovanni Santostasi
<gsantostasi at gmail.com> wrote:
> What do you mean "measure such a cycle?"
> A billion year is a billion year. We have a way to "measure" it. I can even
> write it in scientific notation 10^ 9 years.

That's not the cycle I was talking about.

I meant, the cycle of human history - or of how long a sentient
race walks its homeworld, before leaving completely or going
extinct.

We don't even have one data point for that yet.