We're excited to announce that three new shirts are now available in the mental_floss store! So excited, in fact, we've put all our shirts on sale—just visit our store and use the code "maytees" before checkout.

Offer ends Wednesday, May 12, at 11:59 p.m. EST. Discount does not apply to subscriptions or package deals.

Thanks to Joshua Smith of New Jersey (Homonyms) and Chris Jenkins of Edmonton (Rome) for suggesting the slogans!