INSECTS & SPIDERS

HUMANS AND ANIMALS - Encore Edition - The origins of ancient house cats in China. Crows that hold grudges. And, how global warming is creating a new breed of Arctic explorers - of the avian variety. Also: the lengths squirrels will go to to hide their nuts.

ENCORE PRESENTATION: OCEAN SCIENCE IN THE 21st CENTURY - Old warships become new habitats. An ocean quadcopter gives researchers a sky-high view of the stormy North Atlantic. And, autonomous underwater vehicles that search for sunken treasure. Also, behind the untimely death of the octopus.

BATS & DOLPHINS (Encore Presentation): Dolphins that heal themselves, and dolphins that use electroreception in addition to echolocation. Also, How vampire bats find their prey, and how a Cuban plant takes advantage of a bat's ability to echolocate.

SUSANNE BARD: 25 years ago, the California Condor was nearly extinct. An intensive captive breeding program saved the species. But young condors released into the wild don’t have many experienced birds to show them the ropes. For instance, the birds bring animal bones back to their nests to provid…