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How Our Reality May Be a Sum of All Possible Realities
Richard Feynman’s path integral is both a powerful prediction machine and a philosophy about how the world is. But physicists are still struggling to figure out how to use it, and what it means.
The Secret Life of the North Pole
A universe of microbes is melting with Arctic ice—with consequences for us all.
How Much Is a Living Elephant Worth?
One question for Ralph Chami, assistant director at the International Monetary Fund.
The Misguided History of Racial Medicine
An evolutionary biologist on the harm still being done by unsubstantiated beliefs.
Giant Zombie Atoms of the Cosmos
In neutron stars, astrophysicists see a form of matter like none other.
Is Earth Running Out of Freshwater?
One question for Matthew Birkhold, author of “Chasing Icebergs: How Frozen Freshwater Can Save the Planet.”
Where Are the Black Female Doctors?
Representation of Black women in medicine remains stuck in the 1800s.
Humans Could Go the Way of the Dinosaurs
The time is now to prepare for the cosmic object that could spell our end.
Neuroscience Has a Race Problem
Why Black people are poorly represented in neuroimaging studies—and how science can do better.
If Technology Only Had a Heart
The failure to produce an artificial heart is a testament to the wizardry of nature.
