A haiku has five
Syllables, and then seven
On the second line
According to a
Study by Milner and Stein
In 2005.
They discovered that
The five-seven-five pattern
Was correlated
With most old haiku.
That means haiku have three lines.
Polysyllabic.
This correlation
Was confirmed by researchers
Who can count numbers.
To learn more, check out
My works cited I stole from
Wikipedia.