Over the centuries, our view of light has changed dramatically. The first real theories about light came from the ancient Greeks. Many of these theories sought to describe light as a ray -- a straight line moving from one point to another. Pythagoras, best known for the theorem of the rig...
First, a teenager invented it -- Louis Braille started teaching the code to his classmates at a school for the blind when he was just 15 years old. Second, it completely changed the way people approached education for the blind. Before the invention of Braille, blind people didn't have ...
Dr. Kieval adds, however, that the drive towards zeroastigmatismmay have a downside: forgetting those cataract patients who have successfully adapted to their astigmatism. “I’ve read articles over the years saying that zeroastigmatismshould be the standard of care,” he says, “but I think t...
Which of the cars has the smallest engine capacity? It’s not a trick question. But over 75 percent of 15 year-old school children in Indonesia do not have the mathematical skills to answer it correctly. Every three years, Indonesia’s education system goes through the ritual humiliation of...
Over the centuries, our view of light has changed dramatically. The first real theories about light came from the ancient Greeks. Many of these theories sought to describe light as a ray -- a straight line moving from one point to another. Pythagoras, best known for the theorem of the rig...
Over the centuries, our view of light has changed dramatically. The first real theories about light came from the ancient Greeks. Many of these theories sought to describe light as a ray -- a straight line moving from one point to another. Pythagoras, best known for the theorem of the rig...