Farmers around the world rely on millennia-old wisdom to guide their planting. Scrambled weather and seasons are forcing them into uncharted territory.
Data from two Arctic sites suggest some surface layers are no longer freezing. If that continues, greenhouse gases from permafrost could accelerate climate change.
Three 2016 marine heat waves that killed whales, birds, corals, and shellfish from Australia to Alaska were many times more likely thanks to climate change.
