Research

North Korea tests hydrogen nuclear device

That, in turn, would force tough decisions on the United States, which has a treaty obligation to defend South Korea - with nuclear weapons if necessary. However, the agency said Pyongyang will act as a responsible nuclear state and vowed not to use its nuclear weapons unless its sovereignty was infringed.

Research

Californians told to keep saving water, even as floods approach

Those storms dumped almost 3 inches of rain Tuesday on Southern California, turning Socha's terraced backyard into a raging torrent of mud and debris. Californians cut their water use by 20% in November compared to the previous year, when Governor Jerry Brown declared a water emergency. They say residents must continue with water conservation efforts in order to replenish the empty reservoirs.

Research

BMW previews CES innovations in release including a new interior interface

The 'Vision Future Interaction' concept's goal is to showcase a variety of futuristic dashboard display and interface technology, including a more advanced gesture control system BMW calls AirTouch. The gear selector has moved to the steering column, similar to the BMW i3's arrangement. In pure mode, the driver is in full control, with assistance systems only operating in the background and providing alerts as necessary.

Research

SpaceX's Falcon 9 rocket

Musk agrees: "It's really a massive difference if we can make reusability work ", he said recently at a conference. That was a smaller stage that did not travel as fast and lofted a capsule only briefly into space before it fell back to the ground.

Research

Redskins clinch NFC East crown

Cousins, drafted in the fourth round in 2012, behind #2 overall pick and 2012 NFL Offensive Rookie of the Year Robert Griffin III, atoned for his mistake with two second-half TD passes, to Chris Thompson and Pierre Garcon, the second culminating a back-breaking 13-play, 82-yard drive that ate 7:44 off the clock and pushed the Redskins' lead to 38-17 with 8:55 to go.

Research

SpaceX reusable rocket is the biggest Christmas gift for space enthusiasts

It remains to be known if the Falcon 9 is reusable after its landing. "Congratulations @ SpaceX on your successful vertical landing of the first stage back on Earth!" Miriam Kramer contributed reporting . Its main goal was to blast OrbComm's satellites to orbit and show the world that it recovered from the June 28 disaster, which cost NASA and taxpayers hundreds of millions of dollars.