French police killed the Charlie Hebdo gunmen holed up near Paris while, simultaneously, a separate hostage-taker died in a kosher supermarket siege that claimed four hostages.

Boko Haram militants overrun the town of Baga in northeastern Nigeria, killing an estimated 2,000 people in one of the deadliest attacks in the group's history.

Japan's L0 Series maglev train reached 603 km/h (374 mph) on a test track near Mount Fuji, setting a world speed record for rail vehicles.

Physicists at CERN's LHCb experiment announced firm evidence for pentaquarks, exotic particles made of five quarks bound together.