Climate change is fueling geopolitical competition in the Arctic. An independent Greenland could play an important role in years to come.

Scientists say governments need to act with more urgency to keep global warming in check. How much progress is possible at COP28?

Scientists say the rain forest is approaching a critical tipping point at which the damage is irreversible.

The main battle tanks that the United States and Germany have agreed to provide Ukraine will help its forces punch through Russian fortifications and retake lost territory.

Russia is targeting Ukrainian cities and civilian infrastructure with Iranian-made loitering munitions. Are these weapons effective in shaping the war?