Tom Metcalfe
How to Solve the Drone Traffic Problem
For a clear path, follow the birds.
The Weirdest Stuff We’ve Sent into Orbit
15 human space oddities.
The Moss That Could Terraform Mars
A superhero plant that could thrive on the Red Planet.
Bringing Mars to Earth with Music
A new symphony turns the science of the Red Planet into art.
The Smartphone of the Middle Ages
An accident of lighting uncovers Jewish, European, and Islamic origins.
A Cosmic Glitch in Gravity
Is gravity weaker over distances of billions of light-years?
Nine Rebel Astronomy Theories That Went Dark
Bright ideas from astronomy’s biggest stars haven’t always worked out.
Could Modified Gravity Kill Planet Nine?
A controversial theory can explain phenomena attributed to the mystery planet.
How Did Life Begin?
By imitating early conditions of Earth in the lab, scientists gain new insight into the origin of life.