Josh Clark

I think the 6th century CE.

So it's just amazing that they were able to do this.

And astrolabes were used at sea until the sexton came along about a thousand years later, essentially.

That's how effective they were.

But you could navigate with them.

You could survey with them.

You could also keep time with them because you just adjust the astrolabe to mimic the stars or something like that.

And you can be like, oh, it's 2.30.

It's sandalwood time.

That's right.

It's Sandalwood time.

Then we finally get to the hourglass.

But later than you think, and especially and I'm glad Livia dug deep because she's a great researcher.

But if you just sort of do cursory Internet research, you might find a lot of people saying it's ancient Egypt.

But that's probably not the case.

It's actually much later than that, probably the late medieval period that hourglasses came along and actually after the mechanical clock.

That's nuts.

The earliest known reference is in Italy in 1338.

And you think an hourglass is pretty easy to make?

Like, you know, you just...