Powerful lasers for fragile works of art

"Time alters all things," wrote the Latin poet Horace. Museum conservators would love to prove him wrong. Protecting artworks from the effects of aging requires an understanding of the way materials alter over time. Professor ...

How we know that ancient African people valued fossils and rocks

It's been nearly 50 years since geologist and author Dorothy Vitaliano coined the term "geomythology". This refers to the study of oral traditions from around the world that explain geological and other natural phenomena ...

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