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A gun rights advocate walks through the rotunda of the Kentucky Capitol. Some lawyers argue that the 1689 English Bill of Rights created the legal basis for public carry of weapons in the U.S. Bryan Woolston/Getty Images

Why are medieval weapons laws at the center of a US Supreme Court case?

Many gun rights advocates claim that the right to carry guns is a universal right that has spanned centuries and nations. History tells a different story.
Disturbing the habitats of horseshoe bats, like these in Borneo, increases the risk of virus spillover. Mike Prince/Flickr

Preventing future pandemics starts with recognizing links between human and animal health

How can nations prevent more pandemics like COVID-19? One priority is reducing the risk of diseases’ jumping from animals to humans. And that means understanding how human actions fuel that risk.
Experts estimate that close to 90% of the U.S. population must be vaccinated to reach herd immunity for COVID-19. David McNew/AFP via Getty Images

What is herd immunity? A public health expert and a medical laboratory scientist explain

Vaccination campaigns like the ones that eventually eliminated polio and measles in the United States required decades of education and awareness in order to achieve herd immunity in the U.S. population.
Claire Babineaux-Fontenot, CEO of the national Feeding America anti-hunger network, meets with Jay Worrall, president of a Pennsylvania food bank. Ben Hasty/MediaNews Group/Reading Eagle via Getty Images

What the 100 nonprofits that raised the most money in 2020 indicate about charity today

The Chronicle of Philanthropy’s latest ranking indicates that the coronavirus and heightened awareness about racism made a difference, but not necessarily a lasting one.