From insects to drones

THE ANIMAL KINGDOM is packed with talent surpassing that of humans. A bloodhound's sense of smell, for example, is so keen that it can detect a fugitive's scent days later and distinguish it from those of dozens of innocents that may have travelled the same path in the meantime. Rattlesnakes and other pit vipers can discern and home in on the body heat of their prey, even with their other senses masked. A variety of creatures can perceive sounds beyond the normal range of human hearing.