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One question for Joseph Silk, an astrophysicist at Johns Hopkins University.

The defining problem in the search for ET.

Researchers discover that to sharpen its control over precise maneuvers, the brain uses comparisons between control signals—not the signals themselves.

Early scientists didn’t know it, but we do now: The void in the universe is alive.

One question for J.D. Haltigan, an assistant professor of child and youth mental health at the University of Toronto.

Why are we so sensitive to residential noise?

A new film dives into the intricate lives of giant sperm whales.

Kindness lives in the future-present.

Identify these people and help chart how they will be remembered or forgotten in history.

There was a lot more to this year than stunning images.

How Tangled Bank Studios learned to make science documentaries that feel like feature films.

One question for Nita Farahany, a philosopher at Duke University.