Why do we spring forward and fall back with our clocks each year? Daylight Saving Time was a way to save fuel and make the most of sunlight during World War I, but it has stuck around.
Rivers in the heart of the Amazon rainforest in Brazil fell to their lowest levels in over a century on Monday as a record drought upends the lives of hundreds of thousands of people and damages the jungle ecosystem.
Billions of snow crabs have disappeared from the ocean around Alaska in recent years, and scientists now say they know why: Warmer ocean temperatures likely caused them to starve to death.