Coconut octopuses are among the most intelligent invertebrates around: They use tools, carry their shelters around for when they need them, and, fittingly, adopt an underwater walking motion that's very similar to humans.

Buildings are a big environmental headache. They account for nearly half of the world's climate changing emissions. But things may be different in the years ahead, as VOA's Rosanne Skirble discovered in a laboratory on the campus of Carnegie Mellon University in Pittsburgh.

Shocking, never before seen footage and riveting interviews with trainers and experts manifest the orca's extraordinary nature, the species' cruel treatment in captivity over the last four decades, and the growing disillusionment of workers who were misled and endangered by the highly profitable sea...