[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.10,Default,,0000,0000,0000,,>> DAVID ATTENBOROUGH: Incredibly, 80 percent of all insects
Dialogue: 0,0:00:03.10,0:00:05.44,Default,,0000,0000,0000,,live in jungles.
Dialogue: 0,0:00:05.44,0:00:08.02,Default,,0000,0000,0000,,Few are more successful\Nthan the ants.
Dialogue: 0,0:00:08.02,0:00:12.56,Default,,0000,0000,0000,,There can be eight million\Nindividuals in a single hectare.
Dialogue: 0,0:00:13.82,0:00:17.83,Default,,0000,0000,0000,,But jungle ants don't\Nhave it all their own way.
Dialogue: 0,0:00:24.29,0:00:28.42,Default,,0000,0000,0000,,These bullet ants are showing\Nsome worrying symptoms.
Dialogue: 0,0:00:29.15,0:00:33.52,Default,,0000,0000,0000,,Spores from a parasitic\Nfungus called cordyceps have
Dialogue: 0,0:00:33.52,0:00:38.24,Default,,0000,0000,0000,,infiltrated their\Nbodies and their minds.
Dialogue: 0,0:00:43.42,0:00:47.88,Default,,0000,0000,0000,,Its infected brain\Ndirects this ant upwards,
Dialogue: 0,0:00:49.63,0:00:55.26,Default,,0000,0000,0000,,then utterly disorientated, it\Ngrips a stem with its mandibles.
Dialogue: 0,0:00:55.26,0:00:58.03,Default,,0000,0000,0000,,Those afflicted, if they're\Ndiscovered by the workers,
Dialogue: 0,0:00:58.03,0:01:03.13,Default,,0000,0000,0000,,are quickly taken away and\Ndumped far away from the colony.
Dialogue: 0,0:01:04.45,0:01:08.58,Default,,0000,0000,0000,,It seems extreme, but\Nthis is the reason why.
Dialogue: 0,0:01:10.26,0:01:13.09,Default,,0000,0000,0000,,Like something out of science\Nfiction,
Dialogue: 0,0:01:13.09,0:01:19.03,Default,,0000,0000,0000,,the fruiting body of the cordyceps erupts\Nfrom the ant's head.
Dialogue: 0,0:01:19.64,0:01:24.47,Default,,0000,0000,0000,,[EERIE MUSIC]
Dialogue: 0,0:01:32.61,0:01:35.07,Default,,0000,0000,0000,,It can take three weeks to grow.
Dialogue: 0,0:01:35.07,0:01:39.62,Default,,0000,0000,0000,,And when finished, the deadly\Nspores will burst from its tip.
Dialogue: 0,0:01:39.62,0:01:42.37,Default,,0000,0000,0000,,Then, any ant in the\Nvicinity will be
Dialogue: 0,0:01:42.37,0:01:45.50,Default,,0000,0000,0000,,in serious risk of death.
Dialogue: 0,0:01:47.05,0:01:49.01,Default,,0000,0000,0000,,The fungus is so virulent,
Dialogue: 0,0:01:49.02,0:01:52.07,Default,,0000,0000,0000,,it can wipe out whole\Ncolonies of ants.
Dialogue: 0,0:01:52.23,0:01:56.33,Default,,0000,0000,0000,,And it's not just ants that\Nfall victim to this killer.
Dialogue: 0,0:01:58.03,0:02:00.11,Default,,0000,0000,0000,,There are literally thousands
Dialogue: 0,0:02:00.11,0:02:02.78,Default,,0000,0000,0000,,of different types\Nof cordyceps fungi.
Dialogue: 0,0:02:02.78,0:02:07.59,Default,,0000,0000,0000,,And remarkably, each\Nspecializes on just one species.
Dialogue: 0,0:02:08.52,0:02:42.49,Default,,0000,0000,0000,,[ Music ]
Dialogue: 0,0:02:42.99,0:02:45.97,Default,,0000,0000,0000,,But these attacks do\Nhave a positive effect
Dialogue: 0,0:02:45.97,0:02:49.10,Default,,0000,0000,0000,,on the jungle's diversity, since parasites
Dialogue: 0,0:02:49.10,0:02:53.30,Default,,0000,0000,0000,,like these stop any one group of\Nanimal getting the upper hand.
Dialogue: 0,0:02:54.53,0:02:56.91,Default,,0000,0000,0000,,The more numerous a species becomes,
Dialogue: 0,0:02:56.91,0:03:00.08,Default,,0000,0000,0000,,the more likely it'll be attacked by its nemesis,
Dialogue: 0,0:03:00.08,0:03:03.46,Default,,0000,0000,0000,,a cordyceps fungus.