A researcher measures CO2 emissions from a cicada emergence hole being part of a study from the University of Indiana investigating the effects of cicada emergence on the release of greenhouse gasses as Brood X or Brood 10 cicadas have begun emerging from the ground after 17 years, in Bloomington, Indiana, U.S., May 21, 2021. Picture taken May 21, 2021. REUTERS/Cheney Orr