Our expert voices conversation on genetic testing for cancer.

Genetic testing used to be very expensive, and so was done infrequently and judiciously. But advances in DNA sequencing technology now let us evaluate hundreds of genes for a fraction of what it used to cost to sequence just one.

The American College of Medical Genetics and Genomics has identified a list of genes associated with preventable adult-onset cancer syndromes. Each of these conditions has well-established, evidence-based guidelines for creating surveillance and treatment plans that your physician can use to guide preventive management.

Bottom line: We've long known that 5-10% of cancers derive from DNA mutations we inherit. These cancers tend to occur at an earlier age and affect multiple organs. If we could look at everyone's DNA, we would know who is silently carrying one of these misspellings and take steps to prevent them from developing the disease.

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Exclusive: 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.

22 mins ago - Technology

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.