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Unusual proteins that can quickly fold into different shapes provide cells with a novel regulatory mechanism.

Four mathematicians have cataloged all the tetrahedra with rational angles, resolving a question about basic geometric shapes using techniques from number theory.

Small and cold, Mars has long been considered a dead planet. But a series of recent discoveries has forced scientists to rethink how recently its insides stopped churning — if they ever stopped at all.

In the fight against COVID-19, disease modelers have struggled against misunderstanding and misuse of their work. They have also come to realize how unready the state of modeling was for this pandemic.

Small black holes were nowhere to be found, leading astronomers to wonder if they didn’t exist at all. Now a series of findings, including a “unicorn” black hole, has raised hopes of solving the decade-long mystery.

The relationships among the properties of flexible shapes have fascinated mathematicians for centuries.

Since they can’t prod actual universes as they inflate and bump into each other in the hypothetical multiverse, physicists are studying digital and physical analogs of the process.

Three-dimensional supernova simulations have solved the mystery of why they explode at all.

In grafted plants, shrunken chloroplasts can jump between species by slipping through unexpected gateways in cell walls.