Despite 40 years of research, there is still no reliable, non-invasive pregnancy test for polar bears. Photo: Julia Hager It is not for lack of trying. But to this day scientists know of no reliable way to tell if a polar bear is pregnant. By Dr. Erin Curry This is a...
The most prominent feature of the Bowhead whale is its large skull, which accounts for up to 40 percent of its total body length. Adult bulls can grow up to 16 meters long and reach a weight of 50 to 70 tons. Cows reach a length of up to 18 meters and a weight of up...
Krill is the most important food resource for whales in Antarctica and its availability determines whether female humpback whales become pregnant or not. Photo: Michael Wenger Antarctic krill is one of the most abundant species on our planet. However, its total...
