Scientists have figured out how to stop super-short laser pulses from stretching when they use a technique called achromatic flying-focus, which lets them precisely control how fast the laser's intensity peak moves. In a preprint posted to arXiv (https://arxiv.org/abs/2603.24734), the team presents a theoretical model that explains the pulse-lengthening problem caused by frequency-dependent effects and proposes using a radially-dependent spectral chirp to correct timing mismatches across the beam. They tested the idea with numerical simulations, which showed the pulses stay short while still hitting the desired flying-focus speed over longer distances; the paper also notes that plasmas can naturally reduce this elongation. This is not yet peer-reviewed work and relies entirely on theory and computer simulations rather than lab experiments.