An 80-year-old Japanese mountain climber who has had four heart surgeries reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world’s highest mountain.

One child was killed and another is missing after students on an elementary school fossil-hunting field trip were swept into a water-filled pit when part of a hillside gave way at a park in St. Paul, Minn., authorities said.

Federal authorities on Wednesday arrested a man charged with mailing a letter containing the deadly poison ricin to a U.S. district judge in Spokane, Washington, the FBI said.

An FBI agent shot and killed a man of Chechen origin who turned violent while being questioned on Wednesday about his connection to Tamerlan Tsarnaev, one of two Chechen brothers suspected of carrying out the Boston Marathon bombings.

In a scene right out of Star Trek, a Texas company is developing a 3-D food printer for astronauts to create custom meals on the fly.

Rescue workers with sniffer dogs and searchlights picked through the wreckage of a massive tornado to ensure no survivors remained buried in the rubble of primary schools, houses and buildings in an Oklahoma City suburb.

An Army sergeant at the U.S. Military Academy has been accused of videotaping female cadets in the showers a West Point, a defence official said on Wednesday, the latest in a series of sex-related incidents that has rocked the armed forces.

A Femen activist protested in Paris' Notre Dame Cathedral on Wednesday, one day after far-right historian Dominique Venner committed suicide inside. Venner shot himself at the altar in front of around 1,500 visitors.

The captain of the cruise ship Costa Concordia, which capsized off Italy’s west coast last year killing 32 people, will face trial for manslaughter as well as other charges, an Italian judge ruled on Wednesday.