Officers stand watch at the intersection of West North Avenue and Pennsylvania Avenue as protesters walk for Freddie Gray in Baltimore in April. Gray died from spinal injuries about a week after he was arrested and transported in a police van.
Jabin Botsford/The Washington Post/Getty Images
NYPD Officer Peter Liang arrives at Kings County Supreme Court in Brooklyn, N.Y., after being indicted for the fatal shooting of an unarmed man while patrolling the darkened stairwell of a Brooklyn housing project last November.
The Allen Cell Types Database catalogs all sorts of details about each type of brain cell, including its shape and electrical activity. These cells, taken from the visual area of a mouse brain, are colored according to the patterns of electrical activity they produce.
Courtesy of Allen Institute for Brain Science