"Once every 48 years, forests of the bamboo known as Melocanna baccifera
go into exuberant flower in parts of northeast India [a process called Mautam]
. And then, like clockwork, the event is invariably followed by a plague of black rats that spring from nowhere to spread destruction and famine in their wake. For the first time on film, NOVA and National Geographic capture this massive rat population explosion
in the kind of vivid detail not possible in 1959, when the last invasion occurred." Airing tonight at 8PM on your local PBS station, or catch it online here beginning tomorrow.