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Science news this week: James Webb telescope finds a never-before-seen substance, China's 'Great Green Wall' grows faster than natural trees, and a Medici murder mystery is solved - Live Science

Ben Turner
Jul 4, 2026
Science news this week: James Webb telescope finds a never-before-seen substance, China's 'Great Green Wall' grows faster than natural trees, and a Medici murder mystery is solved - Live Science

July 4, 2026: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

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