In the Oct. 28 SN: Real-life vampires, the ultimate flu shot, no rings for Pluto, tsunami debris stowaways, jellyfish flouts sleep stereotypes, honey carries pesticides, teen concussion stats, a shape-shifting robot and more.
SEEING DOUBLE Some DNA is duplicated in humans. The copies may be responsible for some uniquely human traits and diseases.
POULTRY PROBLEMS So far, most cases of human H7N9 infection have come from exposure to birds, often in live poultry markets. Here, epidemiologists collect samples at a market in Dongguan, China, in 2014.
CDC/Shuqing Zhao, China
VAMPS Creatures that feast on blood have evolved surprising ways to deal with all that fluid and protein, and to get the nutrients blood doesn’t offer.