Five countries that created a treaty nearly four decades ago to protect polar bears through controlled hunting issued a statement that called climate change "the most important long-term threat" to the bears.

If you want to know why Denmark is the world's leader in wind power, start with a three-hour car trip from the capital Copenhagen

chemical sciences Sugars preserve organs longer Growth of ice crystals during organ preservation at low temperatures leaves them unfit for transplantation. Several carbohydrates have the ability to prevent the growth of ice crystals. This ability correlates with the hydration number which is the number of water molecules bound to one carbohydrate molecule. A team of scientists