In this episode on the ecosystems, guide Nam explains the importance of mangroves in the food chain. You'll also see the rafflesia, the largest flower in the world.

In the next segment of this Il était une fois... episode on ecosystems, the Maestro teaches us how to build a butterfly garden. You can build one anywhere—even on your apartment balcony!

In the hope of bringing an end to the troublesome robot rebellion, the humans are sending two robot emissaries of their own to the robot-occupied planet. But how will these guests be received?

Tuberculosis remains a deadly disease—affecting 10.6 million people annually and killing one person every twenty seconds. The recent development of multidrug-resistant strains of the bacteria has made TB even more threatening. Especially affected are areas without the proper means of fighting the illness. Eight countries accounted for more than two thirds of the global total: India, Indonesia, China, the Philippines, Pakistan, Nigeria, Bangladesh and the Democratic Republic of the Congo. According to the WHO, 13 billion dollars would be required to effectively combat the disease.