An Ethical Future for Brain Organoids Takes Shape
Collaborations in progress between ethicists and biologists seek to head off challenges raised by lab-grown “organoids” as they become increasingly similar to human brain tissue.
How Pi Connects Colliding Blocks to a Quantum Search Algorithm
A curious physicist has discovered an unexpected link between theoretical block collisions and a famed quantum search algorithm.
The Voyage to the End of Ice
Arctic ice is disappearing — the question is how fast. Summer sea ice could endure 100 more years, or it could vanish later this decade, with disastrous consequences for the rest of the planet. To nail down the answer, an expedition to the top of the world has to untangle the knotty physics of ice.
Hidden Computational Power Found in the Arms of Neurons
The dendritic arms of some human neurons can perform logic operations that once seemed to require whole neural networks.
Toward a Grand Unified Theory of Snowflakes
Snow crystals come in two main types. The “pope” of snowflake physics has a new theory that explains why.
Famous Fluid Equations Spring a Leak
Researchers have spent centuries looking for a scenario in which the Euler fluid equations fail. Now a mathematician has finally found one.
Continents of the Underworld Come Into Focus
Giant blobs nestled deep in the Earth may influence everything from the structure of island chains to mass-extinction events.
No Dark Energy? No Chance, Cosmologists Contend
A study challenged the evidence for the mysterious antigravitational force known as dark energy. Then cosmologists shot back.
Mathematician Proves Huge Result on ‘Dangerous’ Problem
Mathematicians regard the Collatz conjecture as a quagmire and warn each other to stay away. But now Terence Tao has made more progress than anyone in decades.