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Conch shells, found buried at ancient Pueblo sites in New Mexico, were likely used as communication devices across the arid landscape. James Wainscoat via Unsplash If you were standing on the edge of ...

The rescue mission began with a splash. Flippered and masked snorkelers rolled off a boat anchored near Marathon and into chest-high water. It didn’t take long to spot the target. “This is what we’re ...

It was huge. Its light brown shell stood taller than the tip of my shoe. Its yellowish-green body stretched about an inch ...