Northwestern University Nov 18 2025 In stunning new time-lapse videos, biological nanoparticles scoot and flit across a starry field of glowing dots. Guided by the invisible chemistry of attraction, these microscopic travelers eventually group together to form perfectly round, glowing circles on a black surface. These mesmerizing new videos are made possible with LEVA (light-induced extracellular vesicle and particle adsorption), a groundbreaking new technology from Northwestern University and