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While scissors congruence accurately captures the modern algebraic notion of 2D area, things get more complicated in higher dimensions. Maxine Calle

A brief illustrated guide to ‘scissors congruence’ − an ancient geometric idea that’s still fueling cutting-edge mathematical research

This is a story about geometry, algebra and many different dimensions, best read with construction paper, scissors and tape on hand.
The former president boards his plane at Reagan National Airport following his Aug. 3, 2023, arraignment in Washington. Win McNamee/Getty Images

Donald Trump is right − he is getting special treatment, far better than most other criminal defendants

While Trump has received early warnings ahead of indictments and detailed explanations behind the charges, criminal defendants typically get a bare-bones explanation.
Demonstrators hold Confederate flags near the monument for Confederacy President Jefferson Davis on June 25, 2015, in Richmond, Va., after it was spray-painted with the phrase ‘Black Lives Matter.’ AP Photo/Steve Helber

When Confederate-glorifying monuments went up in the South, voting in Black areas went down

The drive to remove Confederate monuments links those monuments to modern racism. An economic historian shows that the intent and effect of those monuments from inception was to perpetuate racism.
A family photo of Andrea Yates, her husband and four of their five children. Yates killed all five by drowning them in a bathtub in 2001. Photo Courtesy of Yates Family/Getty Images

What’s behind our enduring fascination with wives and mothers who kill?

The framing of these stories of murder and mayhem have remained remarkably consistent since the invention of the printing press – and may reveal our own hidden fears and desires.
As an animal model, the zebrafish offers many advantages that save researchers time and money. Uri Manor/NICHD via Flickr

Zebrafish are a scientist’s favorite for early-stage research – especially to study human blood disorders

Of the many qualities that make the zebrafish a model organism, the fact that it shares 70% of the genes humans have makes it an ideal candidate for developmental biology research.