Editor's choice

Our top photos from the last 24 hours.

North Korea launches rocket

A satellite put into orbit by North Korea does not appear to be transmitting, but the rocket used to get it there delivered twice the payload of a previous launch in 2012.

Supermassive black holes

Known black holes in galaxies near and far.

Twitter's top moments

Events that trended big on the social media site in 2015.

Curtains for Christie

New Jersey Governor Chris Christie ends his campaign for the 2016 Republican nomination.

Farewell Fiorina

Former business executive Carly Fiorina ended her campaign for the 2016 Republican nomination.

The anti-Uber movement

The drivers of London's famous black cabs brought the center of the capital to a standstill in the latest protest against Uber.

Wild elephant on the loose

A wild elephant went on a rampage before being tranquilized in Siliguri, India, after entering from a nearby forest.

Casualties of Syria

Civilians rehabilitate from injuries suffered in Syria's ongoing civil war at a small clinic in Turkey.

New Hampshire votes

White House hopefuls Donald Trump and Bernie Sanders capture New Hampshire.

Bern-ing man

On the campaign trail with Bernie Sanders.

REUTERS/Zohra Bensemra

Tunisia: five years after the "Arab Spring"

Returning to where Mohamed Bouazizi set himself ablaze in a suicide protest over unemployment and police abuse that spread revolt across the Arab world.  Full Coverage 

REUTERS/Anna Filipova

Snow, science, solitude

A Norwegian chain of Arctic islands is seeking to turn numbing cold and total winter darkness into a draw for tourists.   Full Coverage 

REUTERS/Andres Martinez Casares

Haiti slaughterhouse

The market of Croix des Bossales, an area that once held a slave market, stands among impoverished Haiti's interim parliament compound, shipping ports, and downtown Port-au-Prince.  Full Coverage 

REUTERS/Jose Cabezas

Death in San Salvador

El Salvador is racked by drug-fueled violence and gang warfare, turning the Central American country into one of the most violent in the world.  Full Coverage