If you’re fascinated by the upcoming solar eclipse, the cicadas are weirder and bigger, said Georgia Tech biophysicist Saad Bhamla.

“We’ve got trillions of these amazing living organisms come out of the Earth, climb up on trees and it’s just a unique experience, a sight to behold,” Bhamla said. “It’s like an entire alien species living underneath our feet and then some prime number years they come out to say hello.”