Metformin has been one of the most popular drugs used to treat type 2 diabetes for more 60 years, but researchers continue to debate whether it is primarily working through the bloodstream or through the bowel. A new study suggests it works in part by altering proportions of bacteria (particularly Akkermansia and Bifidobacterium) in the gut, which appear to influence blood-sugar levels.

Why it matters: The study, combined with earlier research, suggests certain bacteria in the intestines may play a role in controlling type 2 diabetes. Scientists are always looking for a better way to control sugar levels in the roughly 27 million Americans with type 2 diabetes, which the World Health Organization has predicted will be the seventh leading cause of death by 2030. Fredrik Backhed at the University of Gothenburg, Sweden — a co-author of the new study told New Scientist that he hopes some people might be able to change their gut bacteria via their diet in order to get benefits similar to those from taking Metformin.

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25 mins ago - Technology

TikTok to pull out of Hong Kong

Illustration: Aïda Amer/Axios

TikTok said Monday night that it would pull its social video platform out of the Google and Apple app stores in Hong Kong amid a restrictive new law that went into effect last week.

Why it matters: TikTok's move comes as many large tech companies say they are still evaluating how to respond to the Hong Kong law.

3 hours ago - World

Ethiopia's Nobel Peace laureate cracks down on ethnic violence

The image of a Nobel Peace laureate in military fatigues encapsulates the moment in which Ethiopia finds itself — on the verge of a transition to democracy, a descent into violence or, perhaps, a precarious combination of the two.

Driving the news: At least 166 people were killed after an iconic musician, Haacaaluu Hundeessaa, was murdered last Monday in Addis Ababa, the capital. Prime Minister Abiy Ahmed responded to the violence by sending in troops and shutting off the internet. High-profile opposition leaders were arrested, along with some 2,300 others.

Updated 5 hours ago - Health

Atlanta Mayor Keisha Lance Bottoms tests positive for coronavirus

Atlanta Mayor Keisha Lance Bottoms said on Monday that she has tested positive for the coronavirus after displaying no symptoms.

Why it matters: Bottoms, one of several Black women on the shortlist to be Joe Biden's running mate, has risen to national prominence in recent months as part of mass protests over racism and police brutality — driven in part by the killing of Rayshard Brooks by Atlanta police.