Mountains are collapsing: A Swiss mountain peak fell apart, sending 3.5 million cubic feet of rock into the valley below. Scientists warn climate change could make more mountains crumble.

• Mt. Fluchthorn's tallest peak, on the Swiss-Austrian border, collapsed in June.
• Experts say peaks in the European Alps and Southern Alps of New Zealand are at risk of collapse, too.
• The damage and dangers from mountain collapse disproportionately impact indigenous communities.

On June 11, the main peak of Mt. Fluchthorn, on the border of Austria and Switzerland, collapsed without warning.