This is the Guardian.

Right now, across much of the Midwestern and Eastern U.S.

trillions of cicadas are crawling out from the soil.

17 states from northwest Louisiana up through Illinois and portions of the southeast will experience what some are calling

Cakeda Gedden. This year is extra special. Two brutes are erupting from the

ground at once. They're known as periodical

cicadas. The first brood hasn't been seen for 13 years, the other 17. The

last time they emerged together, Thomas Jefferson was president.

And the sheer numbers of them make for an incredible sight.

I've been in the areas where there are so many coming out of the ground, the

blades of grass look like they're moving with a breeze. As you might imagine, this natural

spectacle has got a lot of scientists excited, but it gets even more impressive.

Give it a week to 10 days and it's louder and louder and louder.

I have measured those courses at 96 decibels.

That would drown out jets flying into Heathrow.

And for Secardus predators, well, it's going to be a bonanza.

The analogy would be if you walked outside and found the world swarming with flying

Cadbury chocolates.

I'd eat a few.

Probably eat a lot.

But why is it that Sakadas spend these long prime number years

waiting to emerge for just a few weeks? How do they keep track of the time

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