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One question for Julie Castillo-Rogez, a planetary geophysicist at NASA’s Jet Propulsion Laboratory.

A new analysis argues that ubiquitous eruptions in the sun’s corona explain the vast flow of charged particles seen streaming out through the solar system.

What future missions to Saturn's moon Titan will reveal about the universe.

For billions of years, rivers connected continents to the sea. Then we came along.

Forgetting and misremembering are the building blocks of creativity and imagination.

One question for Nils Köbis, a social psychologist at the Max Planck Institute for Human Development.

Stone buildings in northern India reveal secrets of old structures that could save lives.

More stimulating environments for captive fish could improve scientific research.

What the COVID-19 pandemic portends.

This essential substance has a history—and future—that’s far from clear.

One question for Michèle Belot, an economist at Cornell University.