Physics

Life might have originated in droplets that behave surprisingly like living cells.

Researchers have discovered that simple “chemically active” droplets grow to the size of cells and spontaneously divide, suggesting they might have evolved into the first living cells.

Gaining an intuition about half-life requires some unintuitive thinking.

Elena Aprile now leads the world’s most sensitive dark-matter search. But before she could build her first detector, she had to make herself out of titanium.

Physicists have failed to find disintegrating protons, throwing into limbo the beloved theory that the forces of nature were unified at the beginning of time.

Janet Conrad has a plan to catch the sterile neutrino — an elusive particle, possibly glimpsed by a number of experiments, that would upend what we know about the subatomic world.

A simple and elegant way to stack identical flat objects so that they project over an edge as far as possible.

The effort to unify quantum mechanics and general relativity means reconciling totally different notions of time.

A proposed theory of gravity does away with dark matter, even as new astrophysical findings challenge the need for galaxies full of the invisible mystery particles.