Photo: Michel Porro / Getty

Recreational marijuana has been legal in Colorado since 2014, but researchers hoping to study the effects of the drug on humans are restricted by federal law to government-grown marijuana, which is significantly weaker and less diverse than commercial weed.

A group of researchers from the University of Colorado Boulder created a loophole by buying a van — the CannaVan — and are traveling around the state to study the physical and mental effects of government-grown marijuana versus commercial marijuana products for sale at local dispensaries, according to WIRED.

How it works: Scientists assign participants particular commercial marijuana products with already-known chemical makeup and potency, which the subjects go out and purchase for themselves. The researchers go to the participants' homes and first perform tests while they are sober. They then measure the effects of the drug after it is smoked, eaten, vaped, etc. But the researchers never see the commercial product itself.

Precision: While the studies are not as precise as a normal lab study, they are as good as it gets given the legal restrictions on researchers.

Go deeper: WIRED's full piece and Sessions hints at federal crackdown on marijuana

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Updated 2 hours ago - Politics & Policy

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Illustration: Eniola Odetunde/Axios

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  2. U.S.: Total confirmed cases as of 10 p.m. ET: 3,053,328 — Total deaths: 132,256 — Total recoveries: 953,420 — Total tested: 37,532,612Map.
  3. Public health: Houston mayor cancels Republican convention over coronavirus concerns Deaths are rising in hotspots — Déjà vu sets in as testing issues rise and PPE dwindles.
  4. Travel: United warns employees it may furlough 45% of U.S. workforce How the pandemic changed mobility habits, by state.
  5. Education: New York City schools will not fully reopen in fallHarvard and MIT sue Trump administration over rule barring foreign students from online classes.
  6. 🎧 Podcast: A misinformation "infodemic" is here.

Transcripts show George Floyd told police "I can't breathe" over 20 times

Photo: Gary Coronado/Los Angeles Times via Getty Images

Newly released transcripts of bodycam footage from the Minneapolis Police Department show that George Floyd told officers he could not breathe more than 20 times in the moments leading up to his death.

Why it matters: Floyd's killing sparked a national wave of Black Lives Matter protests and an ongoing reckoning over systemic racism in the United States. The transcripts "offer one the most thorough and dramatic accounts" before Floyd's death, The New York Times writes.

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Illustration: Sarah Grillo/Axios

An "infodemic" of misinformation and disinformation has helped cripple the response to the novel coronavirus.

Why it matters: High-powered social media accelerates the spread of lies and political polarization that motivates people to believe them. Unless the public health sphere can effectively counter misinformation, not even an effective vaccine may be enough to end the pandemic.