VANISHING ACT These two female northern white rhinos, seen here at the Ol Pejeta Conservancy in Kenya, are the only living members of their subspecies.
J. Stejskal/Safari Park Dvůr Králové
LINE-1 DANCE RNA copies of a jumping gene called LINE-1 (red) are mass produced in mouse embryos at the two-cell stage of development (shown). DNA is shown in blue and cells’ outer boundaries are drawn in orange in this microscope image.
M. Percharde et al/Cell 2018
CUPSA JOE Studies have shown that people who drink four cups of coffee a day have a lower risk of dying of a heart attack. A new study in mice may show one reason for that; caffeine in coffee gives cells energy to fight off damage.