A more or less random collection of online material that I found interesting at some point, arranged in a semi-coherent fashion.
Ephemeral Frozen Bubble. Argumate: afloweroutofstone: averyterrible: ... - argumate. How I Used Lies About A Cartoon to Prove History Is Meaningless on the Internet. Am I taking crazy pills? Untitled.
TYWKIWDBI ("Tai-Wiki-Widbee"): Candle exhibiting "tunneling" Science based - How large would a world have to be for a sailing ship to never make it past the horizon? Sailing ship are now much faster than they used to be.
So it's hard to give a definite answer. Nevertheless, if we consider 18th Century ships, according to that blog post, ships travelled at roughly mph (about km/h). We consider the 18th Century, because before people were not so much travelling to the other side of the world, and after engines started to be more dominant. Now, let's imagine the worst case scenario. A ship sailing in a single direction, and a human, who does nothing else than checking that ship every day for 100 years. Cliff Pickover (@pickover) / Twitter.