Cold War-era spy photography finds second life as climate change record

It was revealed earlier this month that declassified U.S. spy satellite photographs taken above the Antarctic have inadvertently also documented how that continent has been affected by climate change. In this case, deep in the archives of national intelligence agencies are satellite photos half a century old in which scientifically useful data has been hiding in plain sight. These now-outdated spy photographs have thus found an unexpected second life as important tools of planetary science... — the Atlantic