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Fire reaches Kitt Peak National Observatory. Multiple non-scientific structures destroyed, but the mountain's more than two dozen telescopes avoided the worst.

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A sharp cut in methane emissions from gas exploration and animal agriculture could help avoid the worst of the climate crisis

Chernobyl: Facts about the world's worst nuclear disaster

Amazon deforestation in April was the worst in modern records

Star Wars TV shows ranked, worst to best

Mysteries Shroud the Cause of Colorado's Worst Wildfire

Shackleton's Famous Antarctic Shipwreck Finally Discovered in The World's 'Worst Sea'

Covid can shrink brain and damage its tissue, finds research. Worst effect on region linked to smell, while infected people typically scored lower on mental skills test

The 5 worst financial disasters and recessions in history (and what they taught us)

Chernobyl: Facts about the world's worst nuclear disaster

Was King John really the worst monarch in England's history?

No Relief in Sight from Southwest's Megadrought, the Worst in 1,200 Years