By feeding just below the ocean's surface, North Atlantic right whales are at high risk of colliding with ships.
Much of Iceland's controversial whale hunt is driven by tourism, which is why anti-whaling activists are demanding the country ban the practice.
The dwindling of the world's lions, wolves, sharks and other large animals isn't just sad, it's having far-reaching effects on ecosystems.
Gray whales changed their culinary habits to survive lower sea levels during ice ages.
While Japan's Antarctic whaling may be nearing an end, its North Pacific whaling is still going strong.
Since we tend to eat the same fish as these marine predators, this is bad news for humans, too.
The death toll of animals from the BP oil spill in the Gulf of Mexico may be 50 times higher than originally reported.
Older elephants and other animals are better at making crucial decisions in times of danger.
Japan's Antarctic whaling fleet heads for home, as speculation continues about its future.
Japan announces it is "suspending" this year's Antarctic whaling. Is it in fact ending it - and not just this year, but for good?