At first glance, it might not seem like people have much in common with deer. But a strange discovery about how their antlers regenerate is lifting the lid on the unseen ways that our bodies work, too.     Biologist Chunyi Li, who has long studied deer in north-east China, noticed something odd that happened when the animals regrew their antlers each

image:  Close-up of a human liver lobule highlighting GLUL (glutamine synthetase) + liver cells surrounding the central vein (grey), with intensity-based pseudocoloring of CD32b expression showing the highest signal (orange) localized near the central vein and gradually decreasing along the central–portal axis. view more  Credit: Wes Fabyan and Chelsea Fortin Never-before-seen 3D reconstructions of human liver