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Physics

Experiments hint at why bird nests are so sturdy

A bird’s nest is a special version of a granular material. Lab experiments and computer simulations explain its quirky behavior.

Humans

Prehistoric people may have used light from fires to create dynamic art

When brought near flickering flames, prehistoric stone engravings of animals seem to move, experiments with replicas and virtual reality show.

Astronomy

We finally have an image of the black hole at the heart of the Milky Way

Observations from the Event Horizon Telescope reveal the turbulent region around our home galaxy’s black hole, Sagittarius A*, in new detail.

Earth

Machine learning and gravity signals could rapidly detect big earthquakes

Large earthquakes make speed-of-light adjustments to Earth’s gravitational field.