
How to Tell if Extraterrestrial Visitors Are Friend or Foe
They’ll most likely be robotic and guided by AI—so we’ll need our own AI to figure them out

How to Tell if Extraterrestrial Visitors Are Friend or Foe
They’ll most likely be robotic and guided by AI—so we’ll need our own AI to figure them out

Galileo and the Pope Fell Out over a Story about a Cicada
The legendary scientist used the insects’ songs as a metaphor for his theories about the universe. It didn’t go well


Research on Asian Americans and Pacific Islanders Is Being Stifled
Funders and peer reviewers are contributing to systemic racism through their biases about members of these populations

Denial of Evolution Is a Form of White Supremacy
As museums reopen let’s introduce ourselves, and our children, to the original Black ancestors of all human beings

How Humanity Can Earn the Respect of Extraterrestrials
Favoring science over war would demonstrate our suitability to join a galactic club of civilizations

The Origin of Technosignatures
Signs of technology might point to life in the universe, but we have to ask what really gives rise to technology in the first place

All Coral Cells Grown in a Dish for the First Time
A new technique could reveal coral reefs’ vulnerabilities and regenerative potential

Aliens Might Already Be Watching Us
A new star map reveals more than 2,000 stars, some with their own planets, that have a direct view of our planetary presence

Treating a Deadly Lung Disease with a Little Help from Amoebas
Microscopic soil dwellers hint at a way to reverse COPD symptoms

The Animal Viruses Most Likely to Jump into Humans
The SpillOver tool catalogs viruses that could cause a new pandemic

Readers Respond to the March 2021 Issue
Letters to the editor from the March 2021 issue of Scientific American

Plasma Particle Accelerators Could Find New Physics
The next big collider will likely rely on novel technology