[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,If you live on the east coast of the United States,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,you spent the last 17 years of your life
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,walking,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,eating,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and sleeping
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,above a dormant army of insects.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,These are the cicadas.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Every 17 years,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,billions of them emerge from the ground
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to do three things:
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,molt,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,mate,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and die.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There are fifteen different broods of cicadas out there,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,grouped by when they'll emerge from the ground.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Some of these broods are on a 13-year cycle,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,others are on a 17-year clock.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Either way, the cicadas live underground
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,for most of their lives,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,feeding on the juices of plant roots.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,When it's time to emerge,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the adults will begin to burrow their way
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,out of the ground
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and up to the surface,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,where they will live for just a few weeks.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,During these weeks, though,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,everybody will know the cicadas have arrived.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There will be billions of them,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and they're loud.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Male cicadas band together
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to call for female mates,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and their collective chorus can reach
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,up to 100 decibels,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,as loud as a chain saw.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,In fact, if you happen to be using a chain saw
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or a lawn mower,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,male cicadas will flock to you,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,thinking that you're one of them.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Now, like most things in nature,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the cicadas don't arrive without a posse.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There're all sort of awesome and gross predators and parasites
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that come along with the buzzing bugs.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Take the fungus massospora for example.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,This little white fungus buries itself
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,in the cicada's abdomen and eats the bug alive,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,leaving behind its spores.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,When those spores rupture,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,they burst out of the still-alive cicada,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,turning the bug into a flying salt shaker of death,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,raining spores down upon
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,its unsuspecting cicada neighbors.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But while we know pretty precisely
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,when the cicadas will arrive and fade away,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,we're still not totally certain of why.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,There are certain advantages
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to having your entire species emerge at once, of course.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The sheer number of cicadas coming out of the ground
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,is so overwhelming to predators,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,it is essentially guaranteed
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,that a few bugs will survive and reproduce.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,And since cicadas emerge
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,every 13 or 17 years,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,longer than the lifespan of many of their predators,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,the animals that eat them
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,don't learn to depend on their availability.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,But why 13 and 17 years
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,instead of 16,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or 18,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or 12?
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Well, that part no one really knows.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,It's possible the number just happened by chance,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,or, perhaps, cicadas really love prime numbers.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Eventually, the cicadas will mate and slowly die off,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,their call fading into the distance.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,The eggs that they lay will begin the cycle again,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,their cicada babies burrowing into the earth,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,feeding on plant juice,
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and waiting for their turn
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,to darken the skies
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,and fill the air with their songs.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,In 17 years, they'll be ready.
Dialogue: 0,9:59:59.99,9:59:59.99,Default,,0000,0000,0000,,Will you?