Explorersweb on MSN
From Tricouni nails to crampons: The evolution of mountaineering spikes
Two key innovations, the Tricouni nails and the modern crampons, emerged as ways to add grip on slippery ground. Each had its ...
AllAfrica on MSN
Early humans relied on simple stone tools for 300,000 years in a changing East African landscape
Our prehistoric human ancestors relied on deliberately modified and sharpened stone tools as early as 3.3 million years ago.
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