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  • Browse these flavorful products from trailblazing women

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  • Evan Gershkovich’s parents remain hopeful for his release

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  • Key Bridge collapse: NTSB recovers ship’s voyage data recorder

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  • New York Red Bull players give their coats to kids during heavy rain

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Permafrost melting in Alaska poses huge environmental threat

02:29

Much of Alaska sits on huge chunks of underground ice that’s slowly melting, and as the ice melts it releases dangerous greenhouse gases that have been frozen for millions of years. For TODAY, The Weather Channel’s Dave Malkoff reports.