Climate researchers met recently to discuss what information is needed to determine the extent to which human-induced climate change (ex. Pakistani floods, Russian wildfires, etc.) can be blamed for extreme weather events - possibly even straight after they have happened.

Proof of extraterrestrial intelligence could come within 25 years, an astronomer who works on the search.

Scientists are taking a hard look at a proposal to keep a high-tech, yet low-cost, eye on the heavens for asteroids or comets that may Earth in their crosshairs.

Life is about to become more difficult for countries trying to censor access to foreign websites. A system dubbed Collage will allow users in these countries to download stories from blocked sites while visiting seemingly uncontroversial sites such as Flickr.

The Indian Defense Research and Development Organization is working on a range of directed energy weapons, from laser dazzlers to control rioting crowds to high-powered lasers to destroy incoming missiles.

A large asteroid in space that has a remote chance of slamming into the Earth would be most likely hit in 2182, if it crashed into our planet at all, a new study suggests.

New research shows how solar sails could be used on satellites to levitate them above the existing Geostationary orbit, creating a whole new swath of orbital real-estate and potentially relieving existing overcrowding and international tensions.

Protecting Earth from menacing space rocks that could impact our planet should be designated a top-level NASA strategic goal, according to an agency task force. To achieve that goal, NASA should establish a Planetary Defense Coordination Office to oversee the effort, the task force said.

Russia is wrapping up work on the first of a proposed fleet of floating nuclear reactors that would provide electricity to remote areas, but that are also more vulnerable to terrorists and even piracy than traditional power stations, experts say.

Russia’s Foreign Ministry released a report on Saturday accusing the United States of violating dozens of provisions of nuclear, chemical and biological weapons treaties going back about a decade, apparently in a retort to American critics of a new arms treaty, who have been accusing Russia of violating past agreements.