Plausible lies and false truths

While wandering around the Natural History Museum in London, I came up with a little game** that I’d like to try out on you all. The challenge is to come up with a statement that’s difficult to tell whether it’s true or false, but is definitely one or the other. So, we’re looking for really plausible lies or truths that seem false. Here’s an example (from the Museum):

Due to the Coriolis Effect, the spirals in sea shells from the northern hemisphere grow counter-clockwise while shells that grew in the southern hemisphere spiral clockwise.

Sounds plausible enough, but is it true? Do you have any facts that seem false or lies that seem true?

** This can’t be a novel idea…anyone seen this kind of thing somewhere before?