To observe ultrarapid phenomena such as the motion of electrons within matter, researchers need sources capable of producing extremely fast and energetic light radiation. Although devices capable of emitting pulses with attosecond (10-18 seconds) precision already exist, many research teams are striving to stretch the boundaries of these pulses’ duration and intensity.Scientists have now succeeded for the first time in accelerating and guiding electrons in a plasma in a reproducible manner, using a laser.