In 1830, David Walker sewed a pamphlet into the lining of a coat. The volume was thin enough to be hidden, but its content was far from insubstantial. At the time, many members of the US government considered this pamphlet to be one of the most dangerous documents in American history. But what was this incendiary document? And who exactly was the man who wrote it?

Axolotls are one of science’s most studied animals. Why, you ask? These extraordinary salamanders are masters of regeneration: they can flawlessly regenerate body parts ranging from amputated limbs and crushed spines to parts of their eyes and brains. So, how do they do it? And what other secrets are they keeping? Luis Zambrano explores the baffling biology of the axolotl.

Three generations of women attempt to celebrate Mother's Day, but things go sour from the very start. This oddball family includes a crazy father, a domineering grandmother, whacky uncles, but it really gets going when a long time secret is revealed.

Edward Paulino details the 1937 Haitian Massacre.

Michael Murillo gives the full picture on plasma.

Bryan W. Van Norden reveals the man behind the mystery.

Sarah Rosenthal dives into the Abstract Expressionist movement in hopes of answering that question.

Imagine, for a second, a duck teaching a French class. A ping-pong match in orbit around a black hole. A dolphin balancing a pineapple. You probably haven’t actually seen any of these things. But you could imagine them instantly. How does your brain produce an image of something you’ve never seen? Andrey Vyshedskiy details the neuroscience of imagination.

Learn about the life and tragic death of gay rights pioneer Harvey Milk, California's first openly gay public official.

Explore Dante Alighieri’s epic poem, “Divine Comedy,” a 3-part narrative that follows Dante’s journey for salvation through Hell.