Traveling in time might sound like a flight of fancy, but some physicists think it might really be possible. BBC Horizon looked at some of the most promising ideas for turning this staple of science fiction into reality.
Paris St. Germain is hoping its Parc des Princes crowd will help the French giant overturn a 3-1 deficit in its Champions League last-16 return leg against Real Madrid as Unai Emery’s side tries to cope without the injured Neymar.
Scientific research published in the past year has revealed some relatively new and potentially harmful effects that may result from the increase in atmospheric carbon dioxide. An article in a recent issue of Science News raises concerns that rising carbon dioxide levels may steal some crop nutrients.