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The new optical gyroscope — shown here with grains of rice — is 500 times smaller than the current state-of-the-art device.
Credit: Ali Hajimiri/Caltech

Engineers create an optical gyroscope smaller than a grain of rice. A new tiny optical gyroscope fits on the tip of your finger and could find its way into drones and spacecraft in the future. Gyroscopes are devices that help vehicles, drones, and wearable and handheld electronic devices know their orientation in three-dimensional space. They are commonplace in just about every bit of technology we rely on every day. Originally, gyroscopes were sets of nested wheels, each spinning on a different axis...