Science - USA (2021-11-05)

Perseverance rover investigates ancient hydrology p. 711

MARTIAN DELTA

$

5 NOVEMBER 2021

science.org

Freshwater sponge hints at

ancestral cell types p. 717

Tackling biased policing data wins

NOMIS & Science Award p. 701

Can China’s global infrastructure

push really go green? p. 676