A new study led by led by Lamont-Doherty Earth Observatory researcher Tammo Reichgelt explores what it will take for the iconic tropical tree to expand into areas that have long been too cold for palm trees to survive.
Many countries are making progress on improving water sanitation and protecting marine ecosystems. But air pollution continues as a leading health problem in many nations, and fisheries are deteriorating almost everywhere.
Congress is moving closer to opening Alaska’s pristine wilderness to oil and gas development. Columbia scientist Natalie Boelman explains might that mean for the creatures living there.