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Heat inside a cell is like traffic in a city: on some streets the lanes are wide and traffic flows fast, while in narrow alleys everything gets stuck. Scientists have found a way to map such 'traffic jams' for heat without opening the cell. They took tiny diamonds, so small they are invisible to the naked eye, and placed them on a thin gold plate.

A living cell is like a bustling city: cargo moves continuously along its streets, and traffic flows are regulated so that everything needed arrives on time. But while you can watch a city from a helicopter, the cell's interior has long been observable only through a narrow slit — the microscope showed just a flat picture.

A neuron perceives electrical signals like an ultrasensitive microphone picking up the faintest vibrations.

Two road crews are paving a street from opposite ends. They move toward each other, and how well they coordinate determines when the street is finished.

Inside every cell, construction never stops: molecules constantly cluster together and drift apart. Sometimes they form dense droplets, like oil in water, but without a membrane. These droplets act as temporary storage: they hold proteins, gene copies, or DNA repair tools.

Inside every cell, a complex network of genes determines what it will become — a nerve cell, a muscle cell, or part of the skin. This choice often resembles flipping a toggle switch: two stable positions, and the cell decides which way to tip. But cells have a feature rarely considered in such models: they divide.

The cell membrane is not a calm boundary but an arena of relentless Brownian motion. Water molecules, ions, and small metabolites collide chaotically, creating constant pressure on the cell's surface. A new model shows that it is this molecular jostling, not just chemical affinity, that triggers particle uptake, a process known as endocytosis.

In the long extensions of a neuron, the dendrites, tiny couriers are constantly bustling about. These are messenger RNA molecules carrying instructions for protein assembly. Their journey starts at the cell body and ends at synapses — contacts with other neurons.

Two ink reservoirs stand on opposite sides of the cell junction. From them, two types of monomers flow onto the membrane, and when they meet, they form viscous droplets of complexes. The droplets barely move, but the free monomers dart around as fast as perfume molecules in a room.