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Science

Explore scientific questions, experiments and discoveries, with explanations of the evidence and methods behind what researchers conclude.

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EDITOR’S PICK

How Scientific Discovery Works: Evidence, Testing and Uncertainty

Science advances by turning questions into testable ideas, confronting them with evidence and revising what we think we know. Here is how that process really works—and why uncertainty is a strength, not a flaw.

Sep 12, 2026 • 8 min readRead the discovery →
LATEST

Latest discoveries

New stories, explanations and research from Science.

How the Kidneys Keep Water and Salts in Balance featured reference image
Medical Science

How the Kidneys Keep Water and Salts in Balance

The kidneys continually filter blood and adjust how much water and dissolved material returns to the body, helping keep internal conditions within workable ranges.

Sep 29, 2026 • 12 min read
How Do Magnets Work? — documentary reference image
Physics

How Do Magnets Work?

Magnets work through the electromagnetic interaction. Moving electric charges and intrinsic properties of electrons create magnetic moments and fields. In permanent magnets, many atomic-scale…

Sep 26, 2026 • 13 min read
Why Is the Sky Blue? — documentary reference image
Everyday Science

Why Is the Sky Blue?

The sky looks blue because air molecules scatter the shorter wavelengths of visible sunlight more strongly than the longer wavelengths. At sunrise and sunset,…

Sep 23, 2026 • 14 min read
Sleep and circadian-rhythm researcher speaking during a scientific presentation
Medical Science

How Cells Keep Time Without Watching a Clock

Networks of clock genes create near-24-hour cycles inside cells, and light helps a brain-based master clock coordinate those rhythms with the outside world.

Sep 23, 2026 • 13 min read
Two scientists examining illuminated DNA sequencing data in a laboratory
Research Breakthroughs

How CRISPR Finds and Edits a DNA Target

A programmable RNA guide, a DNA-recognizing protein and the cell’s own repair systems turn a bacterial defense mechanism into a genome-editing platform.

Sep 19, 2026 • 12 min read
Two USGS scientists discussing incoming research data in a shipboard computer laboratory
Research Breakthroughs

What Is a Scientific Preprint?

Learn what preprints are, why scientists use them, how they differ from peer-reviewed papers and how to evaluate or cite preliminary research.

Sep 12, 2026 • 6 min read