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Rising temperatures, humidity and extreme weather are being reported as growing threats to cultural treasures worldwide, with effects ranging from damage to centuries-old frescoes to risks for delicate instruments like Stradivarius violins. Experts caution that shifting climate conditions can warp wood, degrade pigments and accelerate deterioration of irreplaceable artworks and artefacts.

Harvard University has been ranked the world's best in 16 STEM subjects, according to a new subject-by-subject assessment. The result underlines the university's dominance in science, technology, engineering and mathematics education, though rankings like this always prompt debate among academics and rival institutions about methodology.