Open with CtrlK — press Esc to close
Somewhere in the last few years, the people who train the largest language models quietly deleted a line from the recipe. Dropout is a breaking part of a neural network on purpose during training, so…
The nerve fibers that report touch from a fingertip are among the longest cells in the body. Their working ends sit in the outer layer of the skin, and everything those ends need has to be carried…
Insulin signaling is one of the tidiest diagrams in cell biology. The hormone lands on its receptor, the receptor trips a relay of enzymes, and at the end of the chain an enzyme called Akt tells the…
Ask a hydrologist how much water is under a given field in Mali, or under a village in Siberia, and the honest answer is usually a shrug. Groundwater is the largest store of liquid fresh water on…
Almost every massive star in the galaxy has a companion, and almost everything known about those pairs comes from looking at them long after they finished forming. By then the orbit has had millions…
Drop a bottle cap into a river and follow it. Within days it can be out at sea, and on the way the water around it turns from fresh to fully salty. It does not travel empty. To anything small enough,…
The hardest part of a physics experiment is often deciding what it should look like: which optical parts, in which order, how long the arms are, where the detector sits. That judgment is taught by…
Concentrated sulfuric acid is what a chemist reaches for when the goal is destruction. At 98% by weight it pulls the water out of sugar, chars paper to carbon and eats through metal. It is also the…
Keep your eyes on this word and notice, without moving them, what is happening at the outer limit of what you can see. A doorway to the left. Someone crossing the room at the far right. That band of…
Melon seeds are a problem on an archaeologist's table. They turn up at Chinese sites, small and flat and stubbornly anonymous: melons, cucumbers and their wild relatives all belong to the genus…
Until now, a Brazilian who wanted to know how much oil had been spilled along their own coast had to know which agency to ask, and then ask several more. The records existed. They were held in…
On a private test track, a robotaxi kept stopping at the same spot. A traffic cone stood a few feet away, and the safety driver had the obvious explanation: the car had seen the cone. The car's own…