1 Edmond Halley: We have the most significant natural philosophers of the past 400 years. What now, Mr Newton?
2 Isaac Newton: We collect ones from the next 400 years.
3 Edmond Halley: The future! What fantastic wonders await us?
4 Isaac Newton: I think you will like the frozen yoghurt, Mr Halley.

I wonder when the first person to think about travelling to see the distant future first thought of doing so. Did people in medieval times fantasise about visiting the future? Did people in Ancient Rome, or Ancient Greece? Did the Ancient Egyptians? Early agricultural communities? People in pre-agricultural hunter/gather bands? Stone Age people??

And did any of them ever imagine frozen yoghurt?