"Electron Acceleration Unveiled: A new study reveals how collisionless shock waves accelerate electrons to extreme speeds, addressing a long-standing puzzle in astrophysics. Conducted using data from NASA's MMS and THEMIS missions, the research uncovers mechanisms behind relativistic electron energies. Impact on Cosmic Ray Understanding: This groundbreaking research could significantly advance our understanding of energy transfer in the universe, shedding light on cosmic ray generation and its implications for astrophysical processes."