Marine Mammals

Southern Resident killer whales have a shortage of food and an overdose of deadly pollutants.

This month brings new books about elephants, energy and an all-too-real mythic figure.

Oceanic plastic poses an increasing threat for these top predators.

Trying to save this species from extinction also means being witness to their destruction.

Fewer than 30 of these rare porpoises remain. Can their extinction be prevented?