Sen. Richard Blumenthal (D-Conn.), next to a poster of an online ad designed to suppress Clinton's vote (AP's Andrew Harnik)

Democratic Sen. Richard Blumenthal today asked Twitter, Google and Facebook to inform all of their users who were exposed to ads and content purchased or placed by Russian actors during the 2016 election.

"You owe your users full information regarding when, where, and how they may have been unwitting participants in Russia's campaign to sow division and spread disinformation in the United States," Blumenthal wrote in letters to the companies' CEOs.

Context: The companies took a lot of heat on Capitol Hill last week for allowing Russian content with malicious intent to spread on their platforms and are under pressure to add new safeguards. Several lawmakers called on the companies to release more information about the ads and stories that appeared on their platforms so citizens have a better idea of what it looks like. Some ads have been released.

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Post-debate poll finds Biden strong on every major issue

Joe Biden speaks Friday about "The Biden Plan to Beat COVID-19," at The Queen theater in Wilmington, Del. Photo: Drew Angerer/Getty Images

This is one of the bigger signs of trouble for President Trump that we've seen in a poll: Of the final debate's seven topics, Joe Biden won or tied on all seven when viewers in a massive Axios-SurveyMonkey sample were asked who they trusted more to handle the issue.

Why it matters: In a time of unprecedented colliding crises for the nation, the polling considered Biden to be vastly more competent.

Bryan Walsh, author of Future
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The murder hornets are here

A braver man than me holds a speciment of the Asian giant hornet. Photo: Karen Ducey/Getty Images

Entomologists in Washington state on Thursday discovered the first Asian giant hornet nest in the U.S.

Why it matters: You may know this insect species by its nom de guerre: "the murder hornet." While the threat they pose to humans has been overstated, the invading hornets could decimate local honeybee populations if they establish themselves.