Human-caused global warming resulting in the Himalayan permafrost thawing was, in part, responsible for the catastrophic glacier and boulder collapse last month. A glacier and rock collapse in Nepal killed nearly 1,400 people and left thousands missing. Key points and original sources are listed below.

• Human-caused global warming resulting in the Himalayan permafrost thawing was, in part, responsible for the catastrophic glacier and boulder collapse last month.S1

• A glacier and rock collapse in Nepal killed nearly 1,400 people and left thousands missing. Scientists say decades of warming helped set the disaster in motion.S2