Amelia shows us how to sharpen a knife using a sharpening stone.
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After years of dialysis and waiting on lists for a transplant, kidney patient Ron explores other routes for a new kidney via the black market.
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Charlie Brooker’s Black Mirror. Coming soon. All new episodes, only on Netflix.... Read More إقرأ المزيد | Share it now!

When you think about animal migration, what comes to mind? Probably birds in flight or wildebeests moving across the Serengeti. Yet the largest migration on the planet is harder to see—and it happens every day. Ocean technologist and submersible pilot Dr. Erika Montague explains how.
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