+ parsing Biden's remarks on Taiwan US Edition - Today's top story: How many bots are on Twitter? The question is difficult to answer and misses the point [View in browser]( US Edition | 24 May 2022 [The Conversation]( Elon Musk has put his planned acquisition of Twitter on hold because he claims the company is undercounting the percentage of spambots on the microblogging platform. The company says its estimate is less than 5%. Setting aside the question of Muskâs motivation for raising the issue, the dispute seems straightforward: What is the prevalence of bots on Twitter? But the reality is considerably murkier. Are all bots spammers? Is most spam and misinformation generated by bots? Are most bots fake accounts, and vice versa? Kai-Cheng Yang and Filippo Menczer of Indiana Universityâs Observatory on Social Media [unpack the murk]( and whatâs involved in estimating bot prevalence. They also explain why even asking the question is less than helpful. Also today: - [Putin is using mass migration to destabilize Europe â again](
- [Protestant leaders made contraception respectable decades ago](
- [The health care needs of refugee communities]( Eric Smalley Science + Technology Editor
Yes, worry about Twitter, but donât worry whether there are hordes of spambots running rampant there. gremlin/E+ via Getty Images
[How many bots are on Twitter? The question is difficult to answer and misses the point]( Kai-Cheng Yang, Indiana University; Filippo Menczer, Indiana University Elon Muskâs focus on the number of bots on Twitter, whether genuine or a distraction, does little to address the problems of misinformation and spam. A pair of social media experts explain why. Politics + Society -
[Biden on Taiwan: Did he really commit US forces to stopping any invasion by China? An expert explains why, on balance, probably not]( Meredith Oyen, University of Maryland, Baltimore County Bidenâs suggestion that the US is prepared to intervene militarily if Taiwan was invaded was quickly walked back by White House officials. -
[The big exodus of Ukrainian refugees isnât an accident â itâs part of Putinâs plan to destabilize Europe]( Mark A. Grey, University of Northern Iowa Putin has a history of forcing civilians to migrate during a conflict, part of a broader strategy to overwhelm other countries with new refugees and destabilize their economies. Ethics + Religion -
[The Catholic Churchâs views on exorcism have changed â a religious studies scholar explains why]( Joseph P. Laycock, Texas State University In the 1960s, the Catholic Church sought to downplay demonic possession, but its views since then have changed. -
[Protestants and the pill: How US Christians helped make birth control mainstream]( Samira Mehta, University of Colorado Boulder Conservative Christians have cheered restrictions on some birth control. But many decades ago, Christian leadersâ support helped contraceptives become acceptable in the first place. Health + Medicine -
[What is a medication, or medical, abortion? 5 questions answered by 3 doctors]( Lauren Owens, University of Michigan; Claire Brindis, University of California, San Francisco; Daniel Grossman, University of California, San Francisco Three experts answer questions about the effectiveness, safety and side effects of medication abortion. -
[Scientists at Work: How pharmacists and community health workers build trust with Cambodian genocide survivors]( Christina Polomoff, University of Connecticut Studying medication use in a traumatized population of immigrants required pharmacists to listen to and learn from trusted community health workers. Economy + Business -
[Why the cost of climate change canât be boiled down to one right number, despite some economistsâ best attempts]( Matthew E. Kahn, USC Dornsife College of Letters, Arts and Sciences Human behaviors shift. Policies change. New technology arrives and evolves. All those changes and more are hard to predict, and they affect tomorrowâs costs. Science + Technology -
[Nuclear isomers were discovered 100 years ago, and physicists are still unraveling their mysteries]( Artemis Spyrou, Michigan State University; Dennis Mücher, University of Guelph Nuclear isomers are rare versions of elements with properties that mystified physicists when first discovered. Isomers are now used in medicine and astronomy, and researchers are set to discover thousands more of them. -
[Yorkicystis, the 500 million-year-old relative of starfish that lost its skeleton]( Samuel Zamora, Instituto Geológico y Minero de España (IGME - CSIC) The discovery of a unique 510 million-year-old fossil in a Pennsylvania churchyard offers new clues into how early life evolved on Earth. From our international editions -
[Did Australia just make a move to the left?]( -
[David Bowie and the birth of environmentalism: 50 years on, how Ziggy Stardust and the first UN climate summit changed our vision of the future]( -
[When is a species really extinct?]( Today's graphic [A map of the United States color coded to show if the county's average temperatures of the past two years have been in their top 10 warmest conditions.]( From the story, [Grim 2022 drought outlook for western US offers warnings for the future as climate change brings a hotter, thirstier atmosphere]( - More from The Conversation US - Like this newsletter? You might be interested in our weekly emails: [Politics Weekly]( ⢠[Science Editors' Picks]( ⢠[This Week in Religion]( ⢠[Weekly Highlights]( ⢠[Global Economy & Business]( -
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