How many paradoxes do you know?

Here's an example of one:

FLETCHER'S PARADOX

Fletcher's Paradox states that absolutely nothing is actually touching the ground...
This works simply; for something to reach the ground it has to go halfway, right? And from that point to the ground it has to go halfway again, and from there halfway again... (etc and so on) so it keeps going halfway and never reaches the ground!

Hope that's understandable, I'm no good at explaining things