Matt Rourke / AP

Zion Harvey, now 10 years old, made medical history when he was given new hands through a double-hand transplant two years ago. As the youngest patient to ever have the procedure, doctors told the BBC that they are amazed by Zion's recovery and believe the knowledge gained from his success will allow other young children to benefit.

Medical tests, as described in The Lancet Child and Adolescent Health journal, show that his brain now recognizes the transplanted hands as his own, enabling Zion to write, feed, and dress himself, as well as grip a baseball bat.

The key finding: The discovery reveals that the brain is still able to communicate with new body parts, despite their absence "during a developmental period of rich fine motor development between the ages of two and eight years," Lead Surgeon Dr. Scott Levin said last year, as cited by the BBC.

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Scoop: Facebook cracks down on political content disguised as local news

Illustration: Eniola Odetunde/Axios

Facebook is rolling out a new policy that will prevent U.S. news publishers with "direct, meaningful ties" to political groups from claiming the news exemption within its political ads authorization process, executives tell Axios.

Why it matters: Since the 2016 election, reporters and researchers have uncovered over 1,200 instances in which political groups use websites disguised as local news outlets to push their point of view to Americans.

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Nationalism and authoritarianism threaten the internet's universality

Illustration: Aïda Amer/Axios

Governments around the world, prompted by nationalism, authoritarianism and other forces, are threatening the notion of a single, universal computer network — long the defining characteristic of the internet.

The big picture: Most countries want the internet and the economic and cultural benefits that come with it. Increasingly, though, they want to add their own rules — the internet with an asterisk, if you will. The question is just how many local rules you can make before the network's universality disappears.

The Democratic fight to shape Biden's climate policy

Illustration: Sarah Grillo/Axios

Left-wing climate activists don't want Joe Biden getting advice from people with credentials they don't like — and they're increasingly going public with their campaign.

Why it matters: Nobody is confusing Biden with President Trump, and his climate platform goes much further than anything contemplated in the Obama years.