Twice a day, Joseph Sekar goes to the roof of his camera repair shop in Chennai, India, and feeds 8,000 parakeets. That's right, 8,000 birds, twice a day. He spends 40% of his income on feeding the birds, who were displaced after the 2006 Southeast Asia floods. It's a lot, but for Joseph, nothing brings more joy than watching the birds fly and knowing they are well-fed and healthy. He's the Birdman of Chennai—and he couldn't be happier. This story is a part of the Planet Earth series.

In Hollywood, everything is magic and make-believe, even sounds. When you watch a film that immerses you completely in its world, you’re probably hearing the work of sound artists. If the work is done right, you won’t be able to tell that the “natural” sounds on screen are manufactured with studio props. That's the challenge for Warner Bros. Foley artists Alyson Moore, Chris Moriana and mixer Mary Jo Lang. Theirs is a practice in recreation, one creative element at a time. This story is a part of the Frontiers series.

When Keith Vonderhuevel lost his arm in a factory accident, he never thought that he'd be able to feel his hand again. That may very well change. Keith is currently a research subject at the Cleveland VA Sensory Restoration Lab, where a team of engineers is pioneering prostheses that allow amputees to feel touch, pressure and intensity. This story is a part of the Human Condition series.