I find I am not the only one to crave chocolate during my monthlies.

It seems to contain a unique composition of caffeine, serotonin, probably some minerals and simply sugar, that really makes you feel better.

Is there any evidence of a food/sweet that could pretend on that role before chocolate was invented?

If we hypothetically had the technology to travel 70 million light years away in an instant, along with some form of powerful telescope...when you looked at earth would you see earth as it was 70 million years ago, dinosaurs and all?

If a camera was placed 1 light year away from Earth with a high enough definition, could it be used to spy on events that took place on Earth one year ago? And, if so, could this technique be used to record our past by sending an array of such cameras to the appropriate distance in order to capture momentous events in Earth's history?

Jon King, Swindon, Wiltshire, UK