Why are polar bears important? Polar bears are at the top of the food chain. They play an integral part of the Arctic ecosystem and have an important role in the overall health of the marine ...

🎬 Live coverage: Oscars 📈 Another teen flu death 🎤 KAABOO canceled ️ Aztecs charter flight issue ⚾ Spring training update Panelists at pandemic preparedness symposium in La Jolla ...