Huge crowds and more than 40 world leaders are expected in Paris to take part in a march after three days of terror that left 17 people dead.
Numerous dignitaries and world leaders are expected to join hundreds of thousands of people in France for a unity rally.
A team of researchers has built an array of light detectors sensitive enough to register the arrival of individual light particles, or photons, and mounted them on a silicon optical chip. Such arrays are crucial components of devices that use photons to perform quantum computations.
Does it matter if you keep an organized email inbox? CNN's Chris Boyette shows you how to do it.
One of deep space's spinning "lighthouses" fades from view as it warps space-time, tilting its radio beams away from Earth.
US company SpaceX says its experiment to bring part of its Falcon rocket down to a soft landing on a floating sea platform did not work - but its cargo mission to the space station remains on track.
The firm says it was a "canary in the coalmine" after being hacked and was reacting to the situation as it unfolded.
Senior figures from the world of sports and entertainment write to the government to call for an overhaul of the secondary ticketing market.
The direct link between terrorism and increased incidence of job burnout over time has been addressed for the first time in a new study. The research examines how the fear of terrorism can lead to insomnia, a major player in job burnout, which is the state of physical, emotional, and mental exhau...
A total of 10 percent of adults living in developed countries practice recreational fishing, which in the Mediterranean Sea represents around 10 percent of the total production of fisheries. Despite its importance, this fishing is not as controlled or studied as professional fishing. For the firs...
A large international study has shown conclusively that statin treatment reduces the risk of cardiovascular disease in women. The research confirms that statins are beneficial not only to women who have already had a cardiovascular event such as a heart attack or stroke, but also in those who - w...
Using the American Heart Association's criteria, a study of 5,000 adults found that the most optimistic people had twice the odds of being in ideal cardiovascular health as their pessimistic counterparts.
Air pollution in Scotland's towns and cities is creating a public health crisis, according to environmental campaigners.
NHS England has announced plans to diagnose an extra 10% of patients with cancer early, in a bid to save more lives.
The Conservatives accuse Labour of failing to say how £20bn of spending it has pledged for its first year in power - if elected in May - would be funded.