A pint-sized tyrannosaur braved the frigid Arctic and feasted on fellow dinosaurs 70 million years ago, according to a report Wednesday on a new species identified from fossilized skull bones in Alaska.
A British Greenpeace protester Tuesday said he was "jubilant" after Russia closed the criminal case against him for staging a protest on an oil rig, and vowed to keep fighting for environmental issues.
Defense Secretary Chuck Hagel said Friday the United States will assert its sovereignty in the rapidly thawing Arctic but called on countries to work together to avoid conflict over the untapped frontier.
Despite its expertise at risky protests, Greenpeace's head admitted he was "extremely surprised" by Russia's response in the Arctic and never imagined activists would face piracy charges and years in jail.
Land within the Arctic circle is likely to experience explosive "greening" in the next few decades as grass, shrubs and trees thrive in soil stripped of ice and permafrost by global warming, a study said on Sunday.