Designing fow regimes
in the Mekong pp. 1252 & 1270
RIVERS
FOR FOOD
Are loggers saving or savaging
Poland’s ancient forest? p. 1240
Guns, accidental deaths, and
violent crime pp. 1259 & 1324
Science-inspired books
for curious kids p. 1244
$15
8 DECEMBER 2017
sciencemag.org