How Blue LEDs Changed the World
Not only are small, energy efficient LEDs used in almost every piece of modern electronics, they have the greatest potential impact on energy savings globally. But LEDs didn't have much use until the '90s, when Japanese scientists discovered the missing link needed to complete the color spectrum: The blue LED.
IRAN, CHINA AGREE $600-BILLION TRADE DEAL AFTER SANCTIONS
Iran and China agreed to expand bilateral ties and increase trade to $600 billion in the next 10 years, President Hassan Rouhani said on Saturday during a visit to Tehran by Chinese President Xi Jinping