Killer Whales

New research suggests that Chinook salmon are being run down by a growing population of killer whales.

• By Alastair Bland

Re-visiting animal rights in the wake of SeaWorld's decision to end its orca shows.

• By Allison Shapiro

Orcas in the Pacific Northwest are struggling to boost their numbers. Could dams have something to do with it?

• By Chelsey B. Coombs