What Defines a Stem Cell?
Our cells have more diverse regenerative capabilities than anyone expected.
Does Having Kids Make Mothers Age Faster?
Evidence is stacking up on both sides of an age-old debate.
If ET Calls, Think Twice About Answering
Why some say searching for ET is best done quietly.
The Multiverse As Muse
The uncertainty of quantum mechanics provided a perfect literary model for Modernist ideas.
Is Consciousness Fractal?
Our subconscious love for fractals may tell an evolutionary story.
This Man Is About to Blow Up Mathematics
Harvey Friedman is about to bring incompleteness and infinity out of quarantine.
Spark of Science: Pardis Sabeti
The computational geneticist explains why she chose research over being a doctor.
Spark of Science: Jon Beckmann
The conservation ecologist discusses the plight of animals in a human-dominated landscape.
Spark of Science: Rob Pringle
The Princeton ecologist tells us about the scientists who inspired his work.