In 221-year first, 2 cicada broods to emerge together
(Newser) -
A swath of the country will soon be buzzing—loudly, with up to a trillion cicadas. This April will mark a first since 1803 with the dual emergence of two periodical cicada groups: Brood XIX, or the Great Southern Brood, which surfaces every 13 years, and Brood XIII, also known...