Whole Foods near Axios World HQ in Arlington, Va., on Day 2 of Amazon control

Researchers at Zhejiang University were able to hack voice assistants like Alexa and Siri using frequencies too high for humans to hear that were still picked up by the devices.

Why it's scary: Many "hey Siri" functions may be harmless, but the researchers could also tell an Amazon Echo to "unlock the back door," redirect the navigation system of an Audi Q3, or install malware on an iPhone. The researchers used a smartphone with just $3 worth of extra hardware. With a little technological expertise, this method could easily be replicated.

Why it matters: Security experts worry the the so-called Internet of Things (including connected devices like digital assistants) are highly vulnerable to security breaches and other attacks not anticipated by manufacturers.

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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
4 hours ago - Science

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.