Scientific American Magazine

Physicists have new ideas about why the energy of empty space is so much weaker than it is predicted to be

The incoming U.S. president must help skeptics see benefits in masks and persuade Congress to spend more money on testing and protective gear

The new administration cannot just go back to the future on carbon emissions

We need to agree on the evidence—so we can disagree on what to do in light of it

Four ways the new administration can elevate evidence and build up the science ranks

The emerald jewel wasp is a cockroach’s worst nightmare

Despite slim evidence, testosterone is keeping some women off the field

As private launches increase dramatically, so will emissions of CO₂, particulates and other noxious substances

Explanations begin to arise at the molecular level for this vexing but commonplace symptom

Flooding and a wood-boring beetle threaten supplies of storied “swamp ash”