Orcas, or killer whales, keep doing things that surprise human observers. The latest example: feeding a disabled pod member. This orca is missing its dorsal fin and one pectoral. It can surface and dive and apparently move well enough to stay with its pod, but can't maneuver nimbly enough to hunt. But it's doing ok. One hesitates to apply a human label like altruism, but it's another example of how tight the family bonds are in these fascinating mammals.