Palaeogeneticists found the earliest example of crossbreeding in a 4,500-year-old tomb in modern-day Syria. Horse-like animals called kungas found there were hybrids between donkeys and the Syrian wild ass. Kungas predate the arrival of horses and are depicted in Sumerian art.
Researchers produced an in-depth study of the highly efficient flight of Ptiliidae beetles, which includes the smallest non-parasitic insects ever discovered. Understanding how these beetles fly helps scientists understand their behaviors and could aid development of miniaturized flying robots.