small eye movements retinal cells changing input

Your eyes move even when you stare

When a person fixes their gaze on one spot, their eyes still make small movements. These movements keep the light-sensitive cells in the retina receiving changing input. Without that change, the cells would stop generating output.

Bad used cars can drive good ones out of the market

Suppose buyers cannot tell a good used car from a bad one. They will be reluctant to pay a high price because the car might be bad. Owners of good cars may then refuse to sell at the lower price, leaving more bad cars in the market.

Bacterial CRISPR keeps pieces of past viruses

Bacteria and archaea can save pieces of viruses they have encountered inside CRISPR regions of their DNA. These saved pieces act as a molecular memory and help guide defenses toward matching viruses during later infections.

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small eye movements retinal cells changing input

Your eyes move even when you stare

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