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Giving a portion of one’s wealth annually is part of the spiritual practice in Islam. gahsoon/E+ via Getty Images

What is Zakat? A scholar of Islam explains

Zakat, or charity, is a fundamental practice within the Islamic faith.
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.
Tiny changes, like a butterfly’s wing flapping, can be amplified downstream in a chaotic system. Catherine Falls Commercial/Moment via Getty Images

What is chaos? A complex systems scientist explains

Part of the 2021 Nobel Prize in Physics was awarded for work modeling Earth’s climate using its chaotic, complex weather. To scientists, chaos lies in the gray zone between randomness and predictability.
Craigslist founder Craig Newmark donates millions of dollars to journalism schools as well as other causes. Bryan Bedder/Getty Images for Rush Philanthropic Arts Foundation

What’s a major donor? A fundraising expert explains

How much money it takes to attain this status varies according to the size of the nonprofit getting the gift.
A late 19th-early 20th century painting by Abbas Al-Musavi depicting the Battle of Karbala, which occurred in 680. Gift of K. Thomas Elghanayan in honor of Nourollah Elghanayan, Photo: Brooklyn Museum

What is the Islamic New Year? A scholar of religion explains

The Islamic New Year marks the first day of Muharram, a sacred month of prayer and annual reflection.
HIPAA allows you to control disclosure of certain types of personal health information. Heath Korvola/DigitalVision via Getty Images

What is the HIPAA Privacy Rule? A health law scholar explains

While the HIPAA Privacy Rule prevents health care providers from sharing your health information without your permission, it doesn’t prevent other people from asking you about it.
Many prominent Christians believe in inerrancy, or that the Bible is without error. Godong/Universal Images Group via Getty Images

What is biblical inerrancy? A New Testament scholar explains

The doctrine of inerrancy likely took shape during the 19th and 20th centuries in the United States, in response to the rise of liberalism within Christianity.
Seattle experienced record high temperatures in June 2021. AP Photo/John Froschauer

3 tips for preventing heat stroke

Left untreated, heat stroke can be fatal, and the elderly are the most at risk.
Virgin Galactic’s Unity VSS spacecraft went on a suborbital test flight in May 2021. VIrgin Galactic

What’s a suborbital flight? An aerospace engineer explains

Both Virgin Galactic and Blue Origin are sending spacecrafts – and their billionaire founders – into suborbital flight. But what differentiates a suborbital flight from a trip around Earth?
The study found that child-free people were just as satisfied with their lives as those with kids. Aleksandr Faustov/EyeEm via Getty Images

Far more adults don’t want children than previously thought

While past studies have placed the proportion of child-free American adults at somewhere between 2% and 9%, a new study found that in Michigan, over 1 in 4 adults don’t want kids.

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