
The Intellectual Warrior
John Horgan is a freelance journalist and a former Scientific American staff writer. He comments on science in his free online journal, Cross-Check, and he has also posted his self-published books Mind-Body Problems (2018) and My Quantum Experiment (2023) online. Horgan teaches science writing at the Stevens Institute of Technology.

The Intellectual Warrior

Illuminator of the Stars

Lying by the Book

It Came from Within

Gravity Quantized?

Plenty of Nothing
A detector finds more particles than expected—but not enough

Counting Down
Pressure mounts on the U.S. to stop nuclear weapons test

Quantum Philosophy
New Experiments-real and imagined - are probing ever more deeply into the surreal quantum realm

Trying Transmutation
Experts debate practicality of a nuclear-waste scheme

Japan, Cold Fusion and Lyndon LaRouche

Life in a Test Tube?

D2 or not D2
A barroom brawl over an "alcoholism gene"

The Lonely Odysseus of Particle Physics

Volcanic Disruption
A giant eruption frays the tattered ozone layer

The End of Clumpiness?

Early Arrivals
Scientists argue over how old the New World is

The Mephistopheles of Neurobiology

After the Inferno
Kuwait has stopped burning, but questions still smolder

The Man who Loves Insects

The Pied Piper of Superstrings

The Danger from Kuwait's Air Pollution

Word Games
Another attempt to create a universal parsing machine

Exporting Misery
A U.S. abortion ruling affects women's health worldwide

Caribbean Killer
Did an impact off Mexico kill the dinosaurs?