by Jeffrey Kluger t’s not easy to swim 175 km (109 mi.) when you’re starving to death. It’s not easy either to try to survive when you’re shedding body weight at a rate of 1 kg (2.2 lbs.) a day. And it might be hardest—or at least most tragic—of all if you’re a nursing momContinue reading “As the Ice Melts, Polar Bears Are Failing to Find Enough Food on Land”