People gathered in cities across America on Saturday for massive student-led protests to demand stronger gun control measures.
Doctors at the Hospital of the University of Pennsylvania were using dyes that glow in the dark to help find cancer.
This week, a self-driving vehicle struck and killed a woman in the American state of Arizona.
United Nations officials say Brasilia, the capital of Brazil, is one of a growing number of cities with water shortages.
Decision-making algorithms in autonomous vehicles.
80 percent of restaurants in France included burgers on their menu last year.
Black Panther will pass The Avengers as the highest-earning superhero film in history.
As a language learner, what is one thing you wish you had more of a chance to do?
Russian President Vladimir Putin says he has no desire for an arms race.
United States lawmakers are calling for more regulation of Facebook.