Eleven Weirdly Spelled Words - And How They Got That Way

Why is English spelling so messed up? We get the same sounds spelled different ways (two, to, too), the same spellings pronounced different ways (chrome, machine, attach), and extra letters all over the place that don't even do anything (knee, gnu, pneumatic).
There aren't always good reasons for these inconsistencies, but there are reasons. Here's a brief look at the history of English spelling told through 11 words.